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Слова на букву extr-hemi (2629)

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Relating to the stomach as a whole and to the pylorus.
Hemorrhage from the stomach. SYN: gastric hemorrhage. [gastro- + G. rhegnymi, to burst forth]
1. Suture of a perforation of the stomach. 2. SYN: gastroplication. [gastro- + G. rhaphe, a stitching]
Excessive secretion of gastric juice or of mucus ( gastromyxorrhea) by the stomach. [gastro- + G. rhoia, a flow]
A tear or bursting of the stomach. [gastro- + G. rhexis, a bursting]
A birth defect in which there is a separation in the abdominal wall. Through this opening protrudes part of the intestines which are not covered by peritoneum (the membrane that ...
: A flexible, lighted instrument that is put through the mouth and esophagus to view the stomach. Tissue from the stomach can be removed through the gastroscope. * * * An ...
Relating to gastroscopy.
Inspection of the interior of the stomach through an endoscope.
Spasmodic contraction of the walls of the stomach.
Relating to the stomach and the spleen. SYN: gastrolienal.
Rarely used term for oozing of blood from the mucous membrane of the stomach. [gastro- + G. staxis, trickling]
Diminution in size of the cavity of the stomach. [gastro- + G. stenosis, narrowing]
SYN: gavage (1).
Lavage of the stomach through a gastric fistula.
A surgical opening into the stomach. This opening may be used for feeding usually via a feeding tube called a gastrostomy tube. This can also be done by percutaneous endoscopic ...
Gastrostomy, percutaneous endoscopic (PEG)
A surgical procedure for placing a feeding tube without having to perform an open laparotomy (operation on the abdomen). The aim of PEG is to feed those who cannot swallow. PEG ...
Conjoined twins united at thorax and abdomen. See conjoined twins, under twin. [gastro- + G. thorax, chest, + pagos, something fixed]
A knife for incising the stomach.
Incision into the stomach. [gastro- + G. tome, incision]
An apparatus used in gastrotonometry.
The measurement of intragastric pressure. [gastro- + G. tonos, tension, + metron, measure]
Poisonous to the stomach.
A cytotoxin specific for the cells of the mucous membrane of the stomach.
Affecting the stomach. [gastro- + G. tropikos, turning]
Rarely used term for gastroxynsis. [gastro- + G. oxys, keen, acid]
Rarely used term for intermittent excessive secretion of the gastric juice. [gastro- + G. oxyno, to make sharp, acid]
The embryo in the stage of development following the blastula; in lower forms with minimal yolk, it is a simple double-layered structure consisting of ectoderm and endoderm ...
Transformation of the blastula into the gastrula; the development and invagination of the embryonic germ layers.
Willis D., U.S. surgeon, 1878–1961. See G. bed.
1. To close an ion channel by electrical ( e.g., membrane potential) or chemical ( e.g., neurotransmitter) action. 2. Action of a special nerve fiber to block the transmission ...
A health professional, typically a physician or nurse, who has the first encounter with a patient and who thus controls the patient's entry into the health care system.
1. In a biologic membrane, the opening and closing of a channel, believed to be associated with changes in integral membrane proteins. 2. A process in which electrical signals ...
Philippe C.E., French physician, 1854–1918. See G. cells, under cell, G. disease, pseudo- G. cell.
Gaucher disease
A series of 5 diseases due to deficient activity of the enzyme glucocerebrosidase, leading to accumulation of glucocerebroside in tissues of the body. The 5 types of Gaucher ...
Gaucher disease, type 1
The most common and best known form of Gaucher disease. It affects the spleen, liver, and bone marrow and spares the brain. The symptoms include enlargement of the spleen ...
Gaucher disease, types 2-5
A series of disease due to glucocerebrosidase deficiency and accumulation of glucocerebroside in cells. By comparison with type 1 Gaucher disease, these are far less frequent ...
Otto Hans, German physiologist, 1909–1979. See Henry-G. response.
A measuring device. SYN: gage. - bite g. SYN: gnathodynamometer. - Boley g. a caliper-type g. graduated in millimeters used to measure the thickness of various dental ...
gaultheria oil
SYN: methyl salicylate.
A glycoside from the bark of several species of Betula (birch); it yields methyl salicylate, d-glucose, and d-xylose on hydrolysis.
A glove. See bandage.
Johann K.F., German physicist, 1777–1855. See g., gaussian curve, gaussian distribution. Karl J., German gynecologist, 1875–1957. See G. sign.
A unit of magnetic field intensity, equal to 10−4 T. [J.K.F. G.]
Amans, French physician, 1871–1937. See Grasset-G. phenomenon.
Relating to or described by Johann K.F. Gauss. See g. curve.
A bleached cotton cloth of plain weave, used for dressings, bandages, and absorbent sponges; petrolatum g. is saturated with petrolatum. [Fr. gaze, fr. Ar. gazz, raw silk] ...
1. Forced feeding by stomach tube. SYN: gastrogavage, gastrostogavage. 2. Therapeutic use of a high-potency diet administered by stomach tube. [Fr. gaver, to gorge fowls]
Hyacinthe, French anatomist, 1753–1802. See G. muscle.
A person who is homosexual, especially a male homosexual. The word "gay" in this regard may denote the homosexual individual or the lifestyle, particularly a male homosexual ...
Gay suicide risk
High rates of suicide have consistently been reported among homosexuals, particularly among adolescents and young adults. A 1989 report concluded that " gay youth are 2 to 3 ...
Joseph L., French naturalist, 1778–1850. See Gay-Lussac equation, Gay-Lussac law.
The act of looking steadily at an object. - conjugate g. movement of both eyes with the visual axes parallel. - dysconjugate g. failure of the eyes to turn together in the same ...
Abbreviation for gonadal steroid-binding globulin.
Abbreviation for gamma benzene hexachloride.
Abbreviation for the guanine and cytosine base pair in polynucleic acids.
Symbol for gadolinium.
The Genome Database (GDB), the official central repository for genomic mapping data resulting from the Human Genome Initiative. Established at Johns Hopkins University in ...
Abbreviation for guanosine 5′-diphosphate.
GDPmannose phosphorylase
SYN: mannose-1-phosphate guanylyltransferase (GDP).
Symbol for germanium.
A genus of nasal botflies (family Oestridae) that includes the species G. cristata and G. haessleri which parasitize wildebeest, hartebeeste, and other African antelopes, and may ...
Infection of herbivores and, rarely, humans with larvae of flies of the genus Gedoelstia, causing ophthalmomyiasis in humans. SYN: bulging eye disease.
Henry Louis, U.S. baseball player; 1903–1941, victim of Lou G. disease. See Lou G. disease.
Richard, German physician, 1859–1930. See G. reflex.
Hans, German physicist, 1882–1945. See G.- Müller counter, G.- Müller tube.
1. A jelly, or the solid or semisolid phase of a colloidal solution. SYN: gelatum. 2. To form a g. or jelly; to convert a sol into a g.. [Mod. L. gelatum] - colloidal g. a ...
Gel electrophoresis
The process in which molecules (such as proteins, DNA, or RNA fragments) can be separated according to size and electrical charge by applying an electric current to them while ...
SYN: gelatinize.
A derived protein formed from the collagen of tissues by boiling in water; it swells up when put in cold water, but dissolves only in hot water; used as a hemostat, plasma ...
Pepsin B; a metalloproteinase that hydrolyzes gelatin and a number of types of collagen. See pepsin.
Producing or containing gelatin or having a gel-like quality. [ gelatin + L. fero, to bear]
Conversion into gelatin or a substance resembling it.
1. To convert into gelatin. 2. To become gelatinous. SYN: gelate.
SYN: gelatinous (2).
1. Pertaining to or characteristic of gelatin. 2. Jellylike or resembling gelatin. SYN: gelatinoid.
1. In colloidal chemistry, the transformation of a sol into a gel. 2. The solidification of a liquid by cold temperatures.
SYN: gel (1). [Mod. L.]
Jean Baptiste Edouard, French physician, 1859–1906. See G. syndrome.
Gelineau syndrome
A neurological disorder marked by a sudden recurrent uncontrollable compulsion to sleep. Named for a French neurologist, JBE Gelineau (1859-1906). Also known as narcolepsy. The ...
Philip G.H., British immunologist. See G. and Coombs reactions, under reaction.
Marie-Ernst, French otologist, 1834–1923. See Gellé test.
Nils, *1896. See Ceelen-G. syndrome.
An extremely firm mass in tissue (especially in a muscle), with a consistency resembling that of frozen tissue. [L. gelo, to freeze, congeal, + G. -osis, condition]
A crystallizable alkaloid derived from gelsemium (yellow jasmine); a mydriatic and central nervous system stimulant. [Mod. L. gelsemium, fr. Pers. yasmin, jasmine]
An actin-binding protein; a Ca2+-triggered actin-filament-severing protein; hence, it has roles in locomotion, secretion, and endocytosis.
Jules A., French surgeon, 1806–1861. See G. suture.
Prefix denoting twin substitutions on a single atom; e.g., the g.-dimethyl substitution on carbon-4 of lanosterol. [L. geminus, twin]
A genus of motile, aerobic, facultatively anaerobic, coccoid bacteria (family Streptococcaceae) that occur singly or in pairs, with flattened adjacent sides. They are ...
The study of twins and the phenomenology of twinning. [L. gemellus, twin-born, + G. logos, study]
SYN: inferior g. (muscle), superior g. (muscle). [L. dim. of geminus, twin]
An antihyperlipidemic agent.
Occurring in pairs. SYN: geminous. [L. gemino, pp. -atus, to double, fr. geminus, twin]
Embryologic partial division of a primordium. For example, g. of a single tooth germ results in two partially or completely separated crowns on a single root. [L. geminatio, a ...
SYN: geminate.
SYN: gemistocytic astrocyte. [G. gemistos, loaded, fr. gemizo, to fill, + -cyte]
SYN: gemistocytic astrocytoma.
Any budlike or bulblike body, especially a taste bud or end bulb. [L. bud]
A form of fission in which the parent cell does not divide, but puts out a small budlike process ( daughter cell) with its proportionate amount of chromatin; the daughter cell ...
1. A small bud that projects from the parent cell, and finally becomes detached, forming a cell of a new generation. 2. SYN: dendritic spines, under spine. [L. gemmula, dim. of ...
Being born, producing, coming to be. [G. genos, birth]
SYN: cheek. [L.]
Relating to the gena, or cheek.
Category to which an individual is assigned by self or others, on the basis of sex. Cf.:sex, g. role.
The basic biological unit of heredity. A segment of deoxyribonucleic acid (DNA) needed to contribute to a function. An official definition: According to the official ...
Gene amplification
Making multiple copies of a gene. Repeated copying of a gene. Gene amplification plays a role in cancer cells. A tumor cell amplifies, or copies, DNA segments as a result of cell ...
Gene deletion
The total loss (or absence) of a gene. Gene deletion plays a role in birth defects and in the development of cancer.
Gene duplication
An extra copy of a gene. Gene duplication is a key mechanism in evolution. Once a gene is duplicated, the identical genes can undergo changes and diverge to create two different ...
Gene expression
A highly specific process in which a gene is switched on at a certain time and "speaks out." A gene communicates by expressing its code. When the gene is expressed, the ...
Gene family
A group of genes related in structure and often in function. The genes belonging to a gene family are descended from an ancestral gene. For example, the hemoglobin genes of ...
gene library
A haphazard assembly of cloned DNA fragments inside of a vector which may contain genetic information about a species.
Gene mapping
The process of determining the relative positions of genes on a chromosome (or another piece of DNA) and the distances between the genes in linkage units or in physical units.
Gene markers
Detectable genetic traits or distinctive segments of DNA that serve as landmarks for a target gene. Markers are on the same chromosome as the target gene. They must be near enough ...
Gene pool
The sum total of genes, with all their variations, possessed by a particular species at a particular time.
Gene product
The RNA or protein that results from the expression of a gene. The amount of gene product is a measure of the degree of gene activity.
Gene silencing
A mechanism by which cells shut down large sections of chromosomal DNA. Gene silencing is done by incorporating the DNA to be silenced into a form of DNA called heterochromatin ...
Gene testing
Testing a sample of blood (or another fluid or tissue) for evidence of a gene. The evidence can be biochemical, chromosomal, or genetic. The aim is to learn whether a gene for a ...
Gene transfer
The insertion of unrelated genetic information in the form of DNA into cells. There are different reasons to do gene transfer. Perhaps foremost among these reasons is the ...
Gene, candidate
Any gene thought likely to cause a disease. The gene may be a candidate because it is located in a particular chromosome region suspected of being involved in the disease or its ...
Gene, evolutionarily conserved
A gene that has remained essentially unchanged throughout evolution. Conservation of a gene indicates that it is unique and essential. There is not an extra copy of that gene ...
Gene, marker
A detectable genetic trait or segment of DNA that can be identified and tracked. A marker gene can serve as a flag for another gene, sometimes called the target gene. A marker ...
Gene, Med1 DNA repair
A gene that codes for one of the key enzymes involved in repairing DNA. The DNA in genes is constantly mutating and being repaired. This repair process is controlled by special ...
Gene, regulatory
A gene that regulates the expression of other genes. A regulatory gene is a nosy gene whose prime preoccupation is to horn in on other genes and control the rate at which they ...
Gene, suicide
A gene whose expression in a cell is lethal for that cell. Suicide genes form the basis of a strategy for making cancer cells more vulnerable, more sensitive to chemotherapy. The ...
Gene, Y-linked
A gene on the Y chromosome. (Y-linkage is analogous to X-linkage (the presence of a gene on the X chromosome) in that it says a gene is on one of the sex chromosomes.) It has ...
Gene, zygotic lethal
A gene that is lethal (fatal) for the zygote, the cell formed by the union of a sperm (male sex cell) and an ovum (female sex cell). The zygote would normally develop into an ...
1. Heredity. 2. The explicit assembly of the descent of a person or family; it may be of any length. [G. genea, descent, + logos, study]
Plural of genus.
General paresis
Progressive dementia and generalized paralysis due to chronic inflammation of the covering and substance of the brain (meningoencephalitis). General paresis is a part of late ...
A general physician or family physician; a physician trained to take care of the majority of diseases not requiring surgery, sometimes including obstetrics.
1. Rendering or becoming general, diffuse, or widespread, as when a primarily local disease becomes systemic. 2. The reasoning by which a basic conclusion is reached, which ...
Involving the whole of an organ, as opposed to a focal or regional process.
1. To produce. 2. To procreate. [L. genero, pp. -atus, to beget]
1. SYN: reproduction (1). 2. A discrete stage in succession of descent; e.g., father, son, and grandson are three generations. [L. generatio, fr. genero, pp. -atus, to ...
Pertaining to generations, i.e., the discrete staging in genealogic descent.
Pertaining to the process of generating.
An apparatus for conversion of chemical, mechanical, atomic, or other forms of energy into electricity. [g., a begetter, producer] - aerosol g. a device for producing airborne ...
1. Relating to or denoting a genus. 2. General. 3. Characteristic or distinctive. [L. genus (gener-), birth]
generic name
1. In chemistry, a noun that indicates the class or type of a single compound; e.g., salt, saccharide (sugar), hexose, alcohol, aldehyde, lactone, acid, amine, alkane, ...
Generic name, drug
The term " generic name" has several meanings as regards drugs: The chemical name of a drug. A term referring to the chemical makeup of a drug rather than to the advertised brand ...
The basic biological units of heredity. Segments of deoxyribonucleic acid (DNA) needed to contribute to a function. An official definition: According to the official ...
Genes, breast cancer susceptibility
Inherited factors that predispose to breast cancer. Put otherwise, these genes make one more susceptible to the disease and so increase the risk of developing breast cancer. Two ...
Relating to generation.
The branch of science concerned with generation or reproduction. [G. genesis, generation, + logos, study]
An origin or beginning process; also used as combining form in suffix position. [G.]
Pertaining to genetics; genetical.
Genetic code
The instructions in a gene that tell the cell how to make a specific protein. A, T, G, and C are the "letters" of the DNA code. They stand for the chemicals adenine, thymine, ...
Genetic counseling
An educational counseling process for individuals and families who have a genetic disease or who are at risk for such a disease. Genetic counseling is designed to provide ...
Genetic counselor
A health professional with a specialized graduate degree and experience in the areas of medical genetics and counseling. Genetic counselors enter the field from a variety of ...
Genetic infantile agranulocytosis
Children born with this condition lack neutrophils (a type of white blood cell that is important in fighting infection). These children suffer frequent infections from bacteria ...
Genetic meltdown
A genomic crisis due to an extraordinarily high rate of mutation, a phenomenon known to occur in viruses and perhaps in other organisms. For example, the antiviral agent ...
Genetic screening
Testing a population to identify individuals at risk for a genetic disease or for transmitting it. Newborns may be screened for PKU (phenylketonuria), Jews for the gene for ...
Genetic transport disease
Within the body, many molecules are able to pass across the membranes that surround cells. These molecules can accomplish this feat due to specific transport systems. These ...
Genetic transposition
The ability of genes to change position on chromosomes, a process in which a transposable element is removed from one site and inserted into a second site in the DNA. Genetic ...
A specialist in genetics.
The scientific study of heredity. Genetics pertains to humans and all other organisms. So, for example, there is human genetics, mouse genetics, fruitfly genetics, etc. Human ...
Relating to inherited individual distinctions in nutritional requirements. [G. genesis, origin, + trophe, nourishment]
Geneva Convention
An international agreement formed at meetings in Geneva, Switzerland, in 1864 and 1906, relating (among medical subjects) to the safeguarding of the wounded in battle, of those ...
Geneva lens measure
See under measure.
Octave, French bacteriologist, 1875–1957. See G. phenomenon, Bordet-G. potato blood agar, Bordet-G. bacillus, Bordet-G. phenomenon, Bordet and G. reaction.
genial, genian
SYN: mental (2). [G. geneion, chin]
Plural of geniculum.
Commonly used to mean genual.
1. Bent like a knee. SYN: geniculated. 2. Referring to the geniculum of the facial nerve, denoting the ganglion there present. 3. Denoting the lateral or medial g. body. [L. ...
SYN: geniculate (1).
1. [TA] A small genu or angular kneelike structure. 2. A knotlike structure. [L. dim. of genu, knee] - g. canalis facialis [TA] SYN: g. of facial canal. - g. of facial canal ...
SYN: g. (muscle). [G. geneion, chin, + glossa, tongue]
SYN: g. (muscle).
SYN: geniohyoid (muscle). [G. geneion, chin, + hyoeides, y-shaped, hyoid]
The tip of the mental spine, a point in craniometry. [G. geneion, chin]
Surgical correction of the bony contour of the chin. [G. geneion, chin, cheek, + plastos, formed]
Pertaining to the external and internal organs of reproduction. (Not to be confused with genetic.) * * * 1. Relating to reproduction or generation. 2. Relating to the primary ...
Genital herpes
A viral infection transmitted through intimate contact with the moist mucous linings of the genitals. This contact can involve the mouth, the vagina or the genital skin. The ...
Genital wart
Warts confined primarily to the moist skin of the genitals or around the anus. These warts are due to viruses belonging to the family of human papillomaviruses (HPVs) which are ...
The male or female reproductive organs. The genitalia include internal structures, such as the ovaries, and external structures, such as the penis. * * * The organs of ...
Genitalia, female internal
The internal genital structures of the female include the ovaries, the Fallopian tubes, the uterus (womb) and the vagina. The ovaries or "egg sacs" are a pair of female ...
In psychoanalysis, a term referring to the genital components of sexuality ( i.e., the penis and vagina), as opposed, for example, to orality and anality.
SYN: genitalia. [see genitalia]
SYN: genitofemoral.
Relating to the genitalia and the thigh; denoting the g. nerve. SYN: genitocrural.
Relating to the organs of reproduction and urination. SYN: urinogenital, urinosexual, urogenital.
Genitourinary (GU)
Pertaining to the genital and urinary systems.
1. Markedly superior intellectual or artistic abilities or exceptional creative power. 2. A person so endowed. 3. In psychology, an individual who ranks in the top 1% of all ...
genius epidemicus
The influence, atmospheric, telluric, or cosmic, or the combination of any two or three, regarded by the ancients as the cause of epidemic and endemic diseases. [Mod. L.]
Francesco, Italian anatomist, 1750–1795. See G. band, G. stria, line of G., stripe of G..
The nucleus of the fertilized ovum.
A genotype at one locus that produces a phenotype which at some levels of resolution is indistinguishable from that produced by another genotype; e.g., two types of ...
Study of the hereditary aspects of cutaneous disorders. [G. genos, birth, descent, + derma, skin, + logos, theory]
A skin condition of genetic origin.
All of the genetic information, the entire genetic complement, all of the hereditary material possessed by an organism. Humans and many other higher animals actually have two ...
Genome annotation
The process of identifying the locations of genes and all of the coding regions in a genome and determining what those genes do. An annotation (irrespective of the context) is a ...
Genome Database
The Genome Database (GDB) is the official central repository for genomic mapping data resulting from the Human Genome Initiative. It was established at Johns Hopkins ...
Genome Research Institute, National Human (NHGRI)
One of the newest of the National Institutes of Health (NIH), NHGRI’s mission in formal terms is to “support the NIH component of the Human Genome Project, a worldwide ...
Genome, Arabidopsis thaliana
All of the genetic information contained in Arabidopsis thaliana, a plant belonging to the mustard family. The genomes of particular nonhuman organisms such as Arabidopsis have ...
Genome, C. elegans (roundworm)
All of the genetic information contained in the roundworm C. elegans (Caenorhabditis elegans). The genomes of particular nonhuman organisms such as C. elegans have been studied ...
Genome, Caenorhabditis elegans (roundworm)
All of the genetic information contained in the roundworm Caenorhabditis elegans (C. elegans). The genomes of particular nonhuman organisms such as C. elegans have been studied ...
Genome, cholera
The genome of the bacterium called Vibrio cholerae that causes cholera. This genome contains over 4 million bases in its DNA including the sequences for nearly 4,000 genes. The ...
Genome, chromosomal
All of the genetic information in the chromosomes of an organism. For humans, that is all of the DNA contained in our normal complement of 46 rod-like chromosomes in virtually ...
Genome, Drosophila
All of the genetic information contained in Drosophila, the fruitfly. The genomes of particular nonhuman organisms such as Drosophila have been studied for a number of reasons ...
Genome, fruitfly
All of the genetic information contained in Drosophila, the fruitfly. The genomes of particular nonhuman organisms such as Drosophila have been studied for a number of reasons ...
Genome, Haemophilus influenzae
This bacterial genome was the first in an independent organism to be sequenced and assembled. Haemophilus influenzae has been a useful model organism, opening the door to ...
Genome, human
All of the genetic information, the entire genetic complement, all of the DNA in a person. Humanity’s DNA has been called "the treasury of human inheritance." The human ...
Genome, mitochondrial
All of the genetic information contained in the chromosome of the mitochondrion, a structure located in the cytoplasm outside the nucleus of the cell. The nucleus houses the ...
Genome, mouse
All of the genetic information contained in the laboratory mouse (Mus musculus). The genomes of particular nonhuman organisms such as the mouse have been studied for a number ...
Genome, Mus musculus
All of the genetic information contained in Mus musculus, the laboratory mouse. The genomes of particular nonhuman organisms such as the mouse have been studied for a number of ...
Genome, mustard Arabidopsis thaliana
All of the genetic information contained in Arabidopsis thaliana, a plant belonging to the mustard family. The genomes of particular nonhuman organisms such as Arabidopsis ...
Genome, plague
All of the DNA (the genome) of the bacterium Yersinia pestis that causes the plague, consisting of four rings of DNA — a large circular chromosome made up of 4,653,728 bases ...
Genome, rice
The first commercially important plant to have its genome sequenced. This feat, completed early in 2001, is particularly important because rice is a staple food for a large ...
Genome, roundworm C. elegans
All of the genetic information contained in the roundworm C. elegans (Caenorhabditis elegans). The genomes of particular nonhuman organisms such as C. elegans have been studied ...
Genome, Saccharomyces cerevisiae (yeast)
All of the genetic information contained in yeast (Saccharomyces cerevisiae). The genomes of particular nonhuman organisms such as yeast have been studied for a number of reasons ...
Genome, Vibrio cholerae
The genome of the bacterium that causes cholera. This genome contains over 4 million bases in its DNA including the sequences for nearly 4,000 genes. The Vibrio cholerae genome ...
Genome, yeast
All of the genetic information contained in yeast (Saccharomyces cerevisiae). The genomes of particular nonhuman organisms such as yeast have been studied for a number of reasons ...
Genome, Yersinia pestis
All of the DNA (the genome) of the bacterium Yersinia pestis that causes the plague, consisting of four rings of DNA — a large circular chromosome made up of 4,653,728 bases ...
Pertaining to the genome, all of the genetic information possessed by any organism. There are, for instance, the human genome, the elephant genome, the mouse genome, the yeast ...
Genomic imprinting
The phenomenon of parent-of-origin gene expression. The expression of a gene depends upon the parent who passed on the gene. For instance, two different disorders – ...
Genomic library
A collection of clones made from a set of randomly generated overlapping DNA fragments representing the entire genome of an organism. As a molecular genetic sequel to John ...
Genomic segment
A region of the genome; it encompasses objects described as loci or probes. Genomic segments can range in size from points to regions as large as an entire chromosome. There are ...
Study of the structure of the genome of particular organisms, including mapping and sequencing. - functional g. the study of expressed genes in organisms, including the identity ...
Genomics, structural
The study of the proteome, the three-dimensional structures of thousands upon thousands of proteins, in fact, all of the proteins produced by a species. In the Human Genome ...
A technology that uses the repair mechanisms normally present in cells to repair gene defects. In genoplasty, a short oligonucleotide fragment is introduced into the cell to ...
A group of organisms in which interbreeding is possible, as evidenced by genetic transfer and recombination.
In microbial genetics, an element of recombination in which one of the pair is not a complete chromosome; commonly used as a suffix ( e.g., endogenote, exogenote, F g.). [gene ...
Denoting a substance that by damaging DNA may cause mutation or cancer. [gene + toxic]
A poisonous substance which damages DNA. A genotoxin can cause mutations in DNA (and so be a mutagen), it can trigger cancer (and so be a carcinogen), or it can cause a birth ...
The genotype is the genetic constitution (the genome) of a cell, an individual or an organism. The genotype is distinct from its expressed features, or phenotype. The genotype of ...
SYN: genotypical.
Relating to the genotype. SYN: genotypic.
A broad spectrum antibiotic of the aminoglycoside class, obtained from Micromonospora purpurea and M. echinospora, that inhibits the growth of both Gram-positive and ...
gentian root
See gentian.
gentian violet
An unstandardized dye mixture of violet rosanilins: it is also used topically as an antiinfective. See crystal violet.
gentian, gentian root
The dried rhizome and roots of Gentiana lutea (family Gentianaceae), an herb of southern and central Europe; a simple bitter.
gentianophil, gentianophile
Staining readily with gentian violet. SYN: gentianophilous. [gentian + G. philos, fond]
SYN: gentianophil.
Not taking a gentian violet stain, or taking it poorly. [gentian + G. phobos, fear]
SYN: β-d-glucosidase.
A disaccharide containing two d-glucopyranose molecules linked β-1,6; a structural moiety in many compounds ( E.G., amygdalin). SYN: amygdalose.
gentisic acid
This compound is chemically related to salicylate and aspirin (acetylsalicylate) and shares with the latter agent analgesic and anti-inflammatory properties. A metabolite of ...
The Latin word for the knee. When the knee is referred to in medicine, it is just called the knee. However, the word "genu" is also used in medicine as in: genu recurvatum ...
Relating to the knee. [L. genu, knee]
In natural history classification, the taxonomic level of division between the family, or tribe, and the species; a group of species alike in the broad features of their ...
SYN: maxillary sinus. [G. genys, cheek, + antron, cave]
The earth, soil. [G. ge, earth]
A cystlike space (or spaces) with or without an epithelial lining, observed radiologically in subarticular bone, usually in arthritic disorders. [Fr., fr. L. geodes, precious ...
The science concerned with the influence of climatic and environmental conditions on health and disease. SYN: nosochthonography, nosogeography.
The study of disease in relation to regions, climates, and other environmental influences.
geophagia, geophagism, geophagy
The practice of eating dirt or clay. SYN: dirt-eating. [ geo- + G. phago, to eat]
Terrestrial, soil inhabiting. [ geo- + G. philos, love, attraction, + -ic]
A genus of centipedes, characterized by very large numbers of legs (47–67 pairs); includes G. californius, G. rubens, and G. umbraticus, in the U.S.
Walter, German bacteriologist, 1889–1920. See Sachs-G. test.
A form of positive barotaxis in which there is a tendency to growth or movement toward or into the earth. SYN: geotropism. [ geo- + G. taxis, orderly arrangement]
An opportunistic systemic hyalohyphomycosis caused by Geotrichum candidum; ascribed symptoms are diverse and suggestive of secondary or mixed infections. [ geo- + G. thrix, ...
A genus of yeastlike fungi that produce arthroconidia but rarely blastoconidia. G. candidum was once thought to cause infection in humans.
SYN: geotaxis. [ geo- + G. trope, a turning]
A protein in the ataxia telangiectasia mutation–related family, essential for glycine receptor clustering on neuronal membranes.
An abnormal and persistent fear of crossing bridges. Sufferers of this phobia experience undue anxiety even though they realize their fear is irrational. Their fear may result ...
A nonbenzodiazepine anxiolytic which resembles buspirone both chemically and pharmacologically. Acts on serotonergic receptors rather than benzodiazepine receptors. Lacks ...
An olefinic terpene alcohol that is the principal constituent of oil of rose and oil of palmarosa; also found in many other volatile oils, such as citronella and lemon grass. ...
geranyl pyrophosphate
A key intermediate in the biosynthesis of sterols, dolichols, ubiquinone, and prenylated proteins.
geranylgeranyl pyrophosphate
A key intermediate in the biosynthesis of many terpenes; the key substrate for introducing the geranylgeranyl group into proteins.
An abnormal and persistent fear of growing old. Sufferers of this fear experience undue anxiety about aging even though they may be in good health—physically, economically and ...
SYN: gerontology.
Gerbich antigen
See under antigen.
Frank, U.S. cardiothoracic surgeon, 1907–1984. See G. defect.
Abbreviation for gastroesophageal reflux disease.
Pierre N., French surgeon, 1797–1856. See G. fibers, under fiber, G. fontanelle, G. hyoid fossa, G. ligament, G. interatrial loop, G. tubercle.

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