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Usher
Barney D., Canadian dermatologist, 1899–1978. See Senear-U. disease, Senear-U. syndrome. Charles Howard, English ophthalmologist, 1865–1942. See U. syndrome.
Usher syndrome
A genetic disorder characterized by hearing impairment and an eye disorder called retinitis pigmentosa in which vision worsens over time. Some people with Usher syndrome also ...
USP
Abbreviation for United States Pharmacopeia. See Pharmacopeia.
USPHS
Abbreviation for United States Public Health Service.
USPHS (United States Public Health Service)
The agency responsible for the public health of the American people. The Public Health Service (PHS) administers a number of critically important health agencies including the ...
ustilaginism
Poisoning by Ustilago maydis (corn smut), which produces burning, itching, hyperemia, acrocyanosis, and edema of the extremities; resembles ergotism, pellagra, or infantile ...
Ustilago
A genus of smuts (order Ustilaginales). [L. a kind of thistle, fr. ustio, a burning] - U. maydis a smut species that resembles ergot of rye in its metabolic action; its black ...
ustulation
1. Separation of compounds by heat, as in the process of freeing ores from sulfur by roasting. 2. Drying of a drug by heat to prepare it for pulverization. [L. ustulo, pp. -atus, ...
usurpation
Assumption of pacemaker function of the heart by a subsidiary focus as a result of its own increased automaticity; e.g., accelerated junctional pacemaker takes command when it ...
uta
A mild form of New World or American cutaneous leishmaniasis caused by Leishmania peruana, occurring in the high Andean valleys of Peru and Bolivia, and characterized by ...
uter-
See utero-.
uterine
Relating to the uterus.
Uterine contraction
The tightening and shortening of the uterine muscles. During labor, contractions accomplish two things: (1) they cause the cervix to thin and dilate (open); and (2) they help the ...
Uterine fibroid
: A benign tumor of the uterus (the womb) and the single most common indication for hysterectomy. Uterine fibroids can be present, but be inapparent. However, they are ...
Uterine fornix
The fornix of the uterus (known in medical Latin as the " fornix uteri") refers to the anterior (front) and posterior (back) recesses into which the upper vagina is divided. ...
Uterine lining
The inner layer of the uterus (womb); the cells that line the womb; anatomically termed the endometrium. This tissue is normally shed monthly in response to the hormonal ...
Uterine retroversion
A slight to dramatic placement of the uterus that orients it toward the back. A tipped uterus is common and usually causes no difficulty. In severe cases, it can affect choice of ...
Uterine rupture
A tear of the uterus, an uncommon but very serious situation that may result in hysterectomy, urologic injury, a need for blood transfusion, maternal death, and perinatal ...
Uterine tube
Also called the Fallopian tube. There are two Fallopian tubes, one on each side. They transport the egg from the ovary to the uterus (the womb). The Fallopian tubes have small ...
utero-, uter-
The uterus. SEE ALSO: hystero- (1), metr-. [L. uterus]
utero-ovarian
Relating to the uterus and an ovary.
uteroabdominal
Relating to the uterus and the abdomen. SYN: uteroventral.
uterocervical
Relating to the cervix of the uterus.
uterocystostomy
Formation of a communication between the uterus (cervix) and the bladder. [utero- + G. kystis, bladder, + stoma, mouth]
uterofixation
SYN: hysteropexy.
uteroglobin
steroid-inducible, evolutionarily conserved, homodimeric secreted protein with many biological activities including a proinflammatory effect, inhibition of soluble ...
uteroglobin-adducin
An α/β heterodimeric protein found in renal tubule cells, thought to regulate ion transport through channels in the actin cytoskeleton. A mutant allele has been found in some ...
uterolith
SYN: uterine calculus. [utero- + G. lithos, stone]
uterometer
SYN: hysterometer.
uteroparietal
Relating to the uterus and the abdominal wall.
uteropelvic
Relating to the uterus and the pelvis.
uteropexy
SYN: hysteropexy.
uteroplacental
Relating to the uterus and the placenta.
uteroplasty
Plastic surgery of the uterus. SYN: hysteroplasty, metroplasty. [utero- + G. plastos, formed]
uterosacral
Relating to the uterus and the sacrum.
uterosalpingography
SYN: hysterosalpingography.
uteroscope
SYN: hysteroscope.
uteroscopy
SYN: hysteroscopy.
uterotomy
SYN: hysterotomy.
uterotonic
1. Giving tone to the uterine muscle. 2. An agent that overcomes relaxation of the muscular wall of the uterus. [utero- + G. tonos, tone, tension]
uterotropic
Causing an effect on the uterus.
uterotubal
Pertaining to the uterus and the uterine tubes.
uterotubography
SYN: hysterosalpingography.
uterovaginal
Relating to the uterus and the vagina.
uteroventral
SYN: uteroabdominal. [utero- + L. venter, belly]
uteroverdine
Biliverdin from dog placenta.
uterovesical
Relating to the uterus and the urinary bladder.
Uterus
The uterus (womb) is a hollow, pear-shaped organ located in a woman's lower abdomen between the bladder and the rectum. The narrow, lower portion of the uterus is the cervix; the ...
Uterus, contraction of the
The tightening and shortening of the uterine muscles. During labor, contractions accomplish two things: (1) they cause the cervix to thin and dilate (open); and (2) they help the ...
Uterus, prolapsed
A uterus that has moved from its normal position in the abdominal cavity, usually into a lower position. Prolapsed uterus may occur because of underlying weak muscles, or simply ...
Uterus, tipped
A slight to dramatic placement of the uterus that orients it toward the back. A tipped uterus is common and usually causes no difficulty. In severe cases, it can affect choice of ...
UTI
Urinary tract infection. (Not to be confused with URI: upper respiratory infection). * * * Abbreviation for urinary tract infection.
Utility
In the analysis of health outcomes, utility is a number between 0 and 1 that is assigned to a state of health or an outcome. Perfect health has a value of 1. Death has a value of ...
UTP
Abbreviation for uridine 5′-triphosphate.
utricle
SYN: utriculus [TA], sacculus communis. - prostatic u. [TA] a minute pouch in the prostate that opens on the summit of the seminal colliculus, the analog of the uterus and ...
utricular
Relating to or resembling a utricle.
utriculi
Plural of utriculus.
utriculitis
Inflammation of the internal ear. [ utriculus + G. -itis, inflammation]
utriculosaccular
Relating to the utricle and the saccule of the labyrinth, denoting especially a duct connecting the two structures.
utriculus
SYN: utricle. SEE ALSO: vestibular labyrinth. [L. dim. of uter, leather bag] - u. prostaticus [TA] SYN: prostatic utricle.
utriform
Shaped like a leather bottle (wineskin). [L. uter, a skin bag, + forma, form]
UV, uv
Abbreviation for ultraviolet.
UVA
Abbreviation for ultraviolet A.
uva ursi
The dried leaves of Arctostaphylos uva-ursi (family Ericaceae), bearberry, mountain box, a common plant of the north temperate zone; contains antiseptic glycosides, arbutin, ...
uvaeformis
SYN: vascular lamina of choroid. [L. uva, grape, + forma, form]
UVB
Abbreviation for ultraviolet B.
Uvea
Part of the eye, the uvea collectively refers to the iris, the choroid of the eye, and the ciliary body: {{}}The iris: The circular, colored curtain of the eye that surrounds ...
uveal
Relating to the uvea.
uveitic
Relating to the uvea.
uveitides
Plural of uveitis.
Uveitis
Inflammation of the uvea, the part of the eye that collectively refers to the iris, the choroid of the eye, and the ciliary body: {{}}The iris: The circular, colored curtain of ...
uveoencephalitis
SYN: Harada syndrome.
uveoscleritis
Inflammation of the sclera involved by extension from the uvea.
uviform
SYN: botryoid. [L. uva, grape, + forma, form]
uviofast
Not weakened or destroyed by subjection to ultraviolet radiation. SYN: uvioresistant. [ uviol (ultraviolet), + fast]
uviol
A special kind of glass more than usually transparent to ultraviolet or actinic rays, e.g., crystalline quartz. [ultraviolet]
uviometer
An instrument for measuring ultraviolet radiation. [ uviol (ultraviolet), + meter]
uvioresistant
SYN: uviofast.
uviosensitive
Sensitive to ultraviolet rays. [ uviol (ultraviolet) + sensitive]
uvitex 2B
A fluorescent stain that reacts with chitin; useful in the diagnosis of microsporidian or cryptosporidium infections.
uvomorulin
A transmembrane protein that links plasma membranes of adjacent cells together in a Ca2+-dependent manner; aids in maintaining the rigidity of the cell layer. SYN: E-cadherin. ...
uvul-
See uvulo-.
Uvula
The small piece of soft tissue that can be seen dangling down from the soft palate over the back of the tongue. The uvula is described variously shaped like a U, a tear or a ...
uvulaptosis
SYN: uvuloptosis.
uvular
Relating to the uvula.
uvularis
SYN: muscle of uvula.
uvulatome
SYN: uvulotome.
uvulectomy
Excision of the uvula. SYN: staphylectomy. [ uvula + G. ektome, excision]
uvulitis
Inflammation of the uvula.
uvulo-, uvul-
The uvula. SEE ALSO: staphylo-. [L. uvula]
Uvulopalatopharyngoplasty
A type of operation designed to tighten up flabby tissues and enlarge the upper air passages. The operation involves reshaping the uvula (uvulo-), soft palate (-palato-) and ...
uvulopalatoplasty
SYN: palatoplasty.
uvuloptosis
Relaxation or elongation of the uvula. SYN: falling palate, staphylodialysis, staphyloptosis, uvulaptosis. [uvulo- + G. ptosis, a falling]
uvulotome
An instrument for cutting the uvula. SYN: uvulatome.
uvulotomy
Any cutting operation on the uvula. [uvulo- + G. tome, a cutting]
V
1. Abbreviation for vision or visual acuity; volt; with subscript 1, 2, 3, etc., the abbreviation for unipolar electrocardiogram leads. 2. Symbol for vanadium; valine; ...
v
1. Abbreviation for volt; initial rate velocity; velocity; vel [L. or]. 2. As a subscript, refers to venous blood. As a subscript, refers to mixed venous (pulmonary arterial) ...
V-bends
V-shaped bends incorporated in an archwire, usually placed mesially or distally to the canines (cuspids) and used as a “dead” area of wire through which torquing bends may ...
V-max
See Vmax.
V-MI
Abbreviation for Volpe- Manhold Index.
V-Y plasty
SYN: V-Y flap.
V. cholerae genome
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 V. cholerae genome is ...
VA
Symbol for alveolar ventilation. Abbreviation for ventriculoatrial.
Va/Q
Abbreviation for ventilation/perfusion ratio.
VAC
Abbreviation for ventriculoatrial conduction.
vaccenic acid
An unsaturated fatty acid of which both cis and trans isomers are found in butter and other animal fats.
vaccina
SYN: vaccinia.
vaccinal
Relating to vaccine or vaccination.
vaccinate
To administer a vaccine.
Vaccination
Injection of a killed microbe in order to stimulate the immune system against the microbe, thereby preventing disease. Vaccinations, or immunizations, work by stimulating the ...
Vaccination, chickenpox (varicella)
This vaccine prevents the common disease known as chickenpox (varicella zoster). While chickenpox is often considered a trivial illness, it can cause significant lost time on ...
Vaccination, children’s
In the United States, it is recommended that all children receive vaccination against: - Hepatitis B - Diphtheria, tetanus, pertussis - Haemophilus influenzae type B (HIB) ...
Vaccination, DPT
DPT immunization protects from diphtheria, pertussis (whooping cough), and tetanus and is given in a series of 5 shots at 2, 4, 6, 18 months of age and 4-6 years of age. ...
Vaccination, DT
DT (diphtheria and tetanus) vaccine does not protect from pertussis and is usually reserved for individuals who have had a significant adverse reaction to a DPT shot or who ...
Vaccination, DTaP
Like DPT, DTaP protects from diphtheria, pertussis (whooping cough) and tetanus. DTaP is the same as DTP, except that it contains only acellular pertussis vaccine which is ...
Vaccination, H. flu
This immunization is designed to prevent disease due to Haemophilus influenzae (H. flu), specifically Haemophilus influenzae type B (HIB). The HIB bacteria is responsible for a ...
Vaccination, Haemophilus influenzae type B (HIB)
Immunization designed to prevent diseases caused by Haemophilus influenzae type B (HIB), a bacteria responsible for a range of serious "invasive" diseases including meningitis ...
Vaccination, hepatitis A
1. When immediate protection against hepatitis A (infectious hepatitis) is needed, immunoglobulins are used. Protection is effective only if given within 2 weeks of exposure and ...
Vaccination, hepatitis B
Hepatitis B (hep B) vaccine gives prolonged protection, but 3 shots over a half year are usually required. All infants in the U.S. receive hep B vaccine. Two vaccines (Engerix-B, ...
Vaccination, HIB
This immunization is designed to prevent diseases caused by Haemophilus influenzae type B (HIB), a bacteria responsible for a range of serious "invasive" diseases including ...
Vaccination, infectious hepatitis
See Vaccination, hepatitis A.
Vaccination, measles
See Vaccination, MMR. Vaccination, MMR: The standard vaccine given to prevent measles, mumps and rubella (German measles). The MMR vaccine is now given in two dosages. ...
Vaccination, mumps
See Vaccination, MMR. Vaccination, pneumococcal pneumonia: This vaccine, which prevents one of the most common and severe forms of pneumonia, is usually given only once in a ...
Vaccination, polio
The vaccines available for vaccination against polio are OPV (Oral Polio Vaccine) and IPV (Inactivated Polio Vaccine). OPV is still the preferred vaccine for most ...
Vaccination, serum hepatitis
Serum hepatitis is hepatitis B (hep B). Hep B vaccine gives prolonged protection, but 3 shots over a half year are usually required. All infants in the U.S. receive hep B vaccine. ...
Vaccination, Td
Td is the vaccine given to children over six and adults as boosters for immunity to diphtheria and tetanus.
Vaccination, varicella zoster
This immunization is aimed at preventing the common disease known as chickenpox (varicella zoster). While chickenpox is often considered a trivial illness, it can cause ...
Vaccination, yellow fever
A live attenuated (weakened) viral vaccine that is recommended for people traveling to or living in tropical areas in the Americas and Africa where yellow fever occurs. Because ...
vaccinator
1. A person who vaccinates. SYN: vaccinist. 2. A scarifier or other instrument used in vaccination.
vaccine
Originally, the live v. ( vaccinia, cowpox) virus inoculated in the skin as prophylaxis against smallpox and obtained from the skin of calves inoculated with seed virus. Usage ...
Vaccine, flu
The flu (influenza) vaccine is recommended for persons at high risk for serious complications from influenza infection, including: Everyone age 65 or more; People with chronic ...
Vaccine, influenza
The influenza (flu) vaccine is recommended for persons at high risk for serious complications from influenza virus infection, including: Everyone age 65 or more; People with ...
Vaccine, meningococcal
A vaccine to prevent meningococcal meningitis, an inflammation of the membranes that cover the brain and spinal cord due to bacterial infection by an organism called Neisseria ...
Vaccine, rubella
A vaccine designed to prevent rubella, or German measles. German measles was once seen merely as a child's unpleasant rite of passage. It was thought to be a mild malady that ...
Vaccine, Sabin
The oral polio vaccine developed by Dr. Albert S. Sabin. The first vaccine against poliomyelitis was introduced by Dr. Jonas Salk in 1955 and was administered by injection ...
Vaccine, Salk
Vaccine against poliomyelitis named for Dr. Jonas Salk who developed and introduced it in 1955. It was the first type of polio vaccine to become available. It was made by ...
Vaccines
Microbial preparations of killed or modified microorganisms that can stimulate an immune response in the body to prevent future infection with similar microorganisms. These ...
vaccinia
An infection, primarily local and limited to the site of inoculation, induced in humans by inoculation with the v. virus, type species in the genus Orthopoxvirus (family ...
vaccinial
Relating to vaccinia.
vacciniform
Resembling vaccinia.
vaccinist
SYN: vaccinator (1).
vaccinization
Vaccination repeated at short intervals until it will no longer take.
vaccinogen
A source of vaccine, such as an inoculated heifer.
vaccinogenous
Producing vaccine, or relating to the production of vaccine.
vaccinoid
Resembling vaccinia.
vaccinostyle
A pointed instrument used in vaccination.
vaccinum
SYN: vaccine. [L.]
vacuolar
Relating to or resembling a vacuole.
vacuolate, vacuolated
Having vacuoles.
vacuolation
1. Formation of vacuoles. 2. The condition of having vacuoles. SYN: vacuolization.
vacuole
1. A minute space in any tissue. 2. A clear space in the substance of a cell, sometimes degenerative in character, sometimes surrounding an englobed foreign body and serving as a ...
vacuolization
SYN: vacuolation.
vacuome
A system of vacuoles that can be stained with neutral red in the living cell. [ vacuole + G. -oma, tumor]
vacuum
An empty space, one practically exhausted of air or gas. [L. ntr. of vacuus, empty]
VAD
Ventricular assist device, a mechanical pump that takes over the function of the damaged ventricle of the heart and restores normal blood flow. Left ventricular assist devices ...
vadum
An occasional elevation from the bottom of a cerebral sulcus nearly obliterating it for a short distance. [L. a ford]
vagal
Relating to the vagus nerve.
vagectomy
Surgical removal of a segment of a vagus nerve.
vagi
Plural of vagus.
vagin-
See vagino-.
Vagina
: The muscular canal extending from the cervix to the outside of the body. It is usually six to seven inches in length, and its walls are lined with mucus membrane. It includes ...
Vagina, septate
A vagina that is divided, usually longitudinally, to create a double vagina. This situation can be easily missed by the patient and even by the doctor on exam. If the patient ...
vaginal
Relating to the vagina or to any sheath. [Mod. L. vaginalis]
Vaginal contraceptive sponge
A contraceptive device that is donut-shaped, made of plastic, contains a spermicide (nonoxynol-9) and is inserted into the vagina to cover the cervix. A loop is provided to ease ...
Vaginal fornix
The fornix of the vagina (in medical Latin, the " fornix vaginae") refers to the anterior (front) and posterior (back) recesses into which the upper vagina is divided. These ...
Vaginal hysterectomy
Removal of the uterus through a surgical incision made within the vagina. With a vaginal hysterectomy, the scar is not outwardly visible. A vaginal hysterectomy is as opposed to ...
Vaginal introitus
The vaginal opening is called the introitus of the vagina. The Latin word " introitus" comes from "intro", into, within + "ire", to go = to go into. In anatomy, an introitus is ...
Vaginal membrane
A thin membrane which completely or partially occludes the vaginal opening. This fold of mucous membrane is usually present at birth at the orifice of the vagina. It is also ...
Vaginal opening
The opening to the muscular canal extending from the cervix to the outside of the body. The word "vagina" is a Latin word meaning "a sheath or scabbard", a scabbard into which one ...
Vaginal spermicide
A vaginal spermicide is a substance that will kill sperm in the vagina. Vaginal spermicides are available in foam, cream, jelly, film, suppository, or tablet forms. All ...
Vaginal vestibule
The vaginal opening is called the vestibule of the vagina. In medicine, a vestibule is a space or cavity at the entrance to a canal, channel, tube, vessel. In ancient Rome, the ...
vaginapexy
SYN: vaginofixation.
vaginate
1. To ensheathe; to enclose in a sheath. 2. Ensheathed; provided with a sheath.
vaginectomy
Excision of the vagina or a segment thereof. SYN: colpectomy. [vagina + G. ektome, excision]
vaginism
SYN: vaginismus.
vaginismus
Painful spasm of the vagina preventing intercourse. SYN: vaginism, vulvismus. [vagina + L. -ismus, action, condition] - posterior v. spasmodic stenosis of the vagina caused by ...
Vaginitis
Inflammation of the vagina. The vagina is the muscular canal extending from the cervix to the outside of the body. Vaginitis is often caused by a fungus. A woman with this ...
Vaginitis, atrophic
Thinning of the lining (the endothelium) of the vagina due to decreased production of estrogen. This may occur with menopause. Vaginitis means inflammation of the vagina, the ...
vagino-, vagin-
The vagina. SEE ALSO: colpo-. [L. vagina, sheath]
vaginoabdominal
Relating to the vagina and the abdomen.
vaginocele
SYN: colpocele (1).
vaginodynia
Vaginal pain. SYN: colpodynia.
vaginofixation
Suture of a relaxed and prolapsed vagina to the abdominal wall. SYN: colpopexy, vaginapexy, vaginopexy.
vaginohysterectomy
SYN: vaginal hysterectomy.
vaginolabial
Relating to the vagina and the pudendal labia.
vaginomycosis
Vaginal infection due to a fungus. SYN: colpomycosis.
vaginopathy
Any diseased condition of the vagina. [vagino- + G. pathos, suffering]
vaginoperineal
Relating to or involving the vagina and perineum.
vaginoperineoplasty
Plastic surgery of the perineum involving the vagina. SYN: colpoperineoplasty. [vagino- + perineum, + G. plastos, formed]
vaginoperineorrhaphy
Repair of a lacerated vagina and perineum. SYN: colpoperineorrhaphy. [vagino- + perineum, + G. rhaphe, suture]
vaginoperineotomy
SYN: episiotomy. [vagino- + perineum, + G. tome, incision]
vaginoperitoneal
Relating to the vagina and the peritoneum.
vaginopexy
SYN: vaginofixation.
vaginoplasty
Plastic surgery of the vagina. SYN: colpoplasty. [vagino- + G. plastos, formed]
vaginoscopy
Inspection of the vagina, usually with an instrument.
vaginosis
Disease of the vagina. - bacterial v. infection of the human vagina that may be caused by anaerobic bacteria, especially by Mobiluncus species or by Gardnerella vaginalis. ...
vaginotomy
SYN: colpotomy.
vaginovesical
Relating to the vagina and the urinary bladder.
vaginovulvar
Relating to the vagina and the vulva.
Vaginulus plebeius
The slug vector of Angiostrongylus costaricensis.
vagitus uterinus
Crying of the fetus while still within the uterus, possible when the membranes have been ruptured and air has entered the uterine cavity. [L. fr. vagio, to squall; L. fr. uterus, ...
vago-
The vagus nerve. [L. vagus]
vagoaccessorius
The vagus and the cranial root (accessory portion) of the accessory nerve, regarded as one nerve. See accessory nerve [CN XI].
vagoglossopharyngeal
Relating to the vagus and glossopharyngeal nerves; denoting their contiguous or common nuclei of origin and termination and regions innervated by both nerves such as the ...
vagolysis
Surgical destruction of the vagus nerve. [ vago- + G. lysis, a loosening]
vagolytic
1. Pertaining to or causing vagolysis. 2. A therapeutic or chemical agent that has inhibitory effects on the vagus nerve. 3. Denoting an agent having such effects.
vagomimetic
Mimicking the action of the efferent fibers of the vagus nerve.
vagotomy
Division of the vagus nerve. [ vago- + G. tome, incision]
vagotonia
Archaic designation for a condition in which the parasympathetic autonomic system is reputedly overactive. SYN: parasympathotonia, sympathetic imbalance. [ vago- + G. tonos, ...
vagotonic
Relating to or marked by vagotonia.
vagotropic
Attracted by, hence acting upon, the vagus nerve. [ vago- + G. tropos, turning]
vagovagal
Pertaining to a process that utilizes both afferent and efferent vagal fibers.
vagus
SYN: v. nerve [CN X]. [L. wandering, so-called because of the wide distribution of the nerve]
Vagus nerve
A remarkable nerve that supplies nerve fibers to the pharynx (throat), larynx (voice box), trachea (windpipe), lungs, heart, esophagus, and the intestinal tract as far as the ...
Val
Symbol for valine and valyl.
valence, valency
The combining power of one atom of an element (or a radical), that of the hydrogen atom being the unit of comparison, determined by the number of electrons in the outer shell of ...
valent
Possessing valence.
Valentin
Gabriel G., German-Swiss physiologist, 1810–1883. See V. corpuscles, under corpuscle, V. ganglion, V. nerve.
Valentine
Ferdinand C., U.S. surgeon, 1851–1909. See V. position, V. test.
valepotriates
A class of iridoid alkaloids from Valeriana sp. and Kentranthus sp.; E.G., the drug valtratum is a member of this class.
valerate
A salt of valeric acid; some are used in modern medicine. SYN: valerianate.
valerian
1. The rhizome and roots of Valeriana officinalis (family Valerianaceae), a herb native in southern Europe and northern Asia, cultivated also in Great Britain and the U.S.; has ...
valerianate
SYN: valerate.
valeric acid
Normal aliphatic acid; distilled from valerian; some of its salts are used in medicine; found in human colon. SYN: pentanoic acid.
valethamate bromide
An anticholinergic agent.
Valetudinarian
Someone with a weak or sickly constitution, especially someone whose chief concern is being or becoming a chronic invalid. The word "valetudinarian" comes from the Latin ...
valetudinarianism
A weak or infirm state due to invalidism.
valgoid
Relating to valgus; knock-kneed; suffering from talipes valgus. [L. valgus, bowlegged, + G. eidos, resemblance]
valgus
Bent or twisted outward away from the midline or body; modern accepted usage, particularly in orthopedics, erroneously transposes the meaning of varus to v., as in genu valgum ...
valid
Effective; producing the desired result; verifiably correct. [L. valeo, to be strong]
validation
The act or process of making valid. - consensual v. the confirmation of the experience or judgment of one person by another.
validity
An index of how well a test or procedure in fact measures what it purports to measure; an objective index by which to describe how valid a test or procedure is. - concurrent v. ...
valine
2-Amino-3-methylbutanoic acid; the l-isomer is a constituent of most proteins; a nutritionally essential amino acid.
valinomycin
Cyclododecadepsipeptides ionophore antibiotic derived from Streptomyces fulvissius; a 36-membered ring structure consisting of 3 mol each of l-valine, d-α-hydroxyisovaleric ...
valla
Plural of vallum.
vallate
Bordered with an elevation, as a cupped structure; denoting especially certain lingual papillae. SEE ALSO: circumvallate. [L. vallo, pp. -atus, to surround with, fr. vallum, a ...
Vallecula
An anatomic term for a crevice, furrow or depression. There are a variety of valleculae including one in the brain, another in the nail matrix, etc. However, used alone, the ...
Valleix
François L. I., French physician, 1807–1855. See V. points, under point.
valley
SYN: vallecula.
valnoctamide
An antianxiety agent. SYN: valmethamide.
valoid
SYN: equivalent extract. [L. valeo, to be strong]
valproic acid
An anticonvulsant used to treat seizure disorders; also used as the sodium salt, valproate sodium.
Valsalva
Antonio M., Italian anatomist, 1666–1723. See aneurysm of sinus of V., V. antrum, V. ligaments, under ligament, V. maneuver, V. muscle, V. sinus, teniae of V., under tenia, ...
Valsalva maneuver
A maneuver in which a person tries to exhale forcibly with a closed glottis (the windpipe) so that no air exits through the mouth or nose as, for example, in strenuous ...
value
A particular quantitative determination. For values not given below, see the specific name. SEE ALSO: index, number. [M.E., fr. O.Fr., fr. L. valeo, to be of v.] - acetyl v. the ...
Value, Daily (DV)
A new term appearing on food labels, Daily Value is a new dietary reference value designed to help consumers use food label information to plan a healthy diet. Daily Values (DVs) ...
valva
SYN: valve. [L. one leaf of a double door] - v. aortae [TA] SYN: aortic valve. - v. atrioventricularis dextra [TA] SYN: tricuspid valve. - v. atrioventricularis sinistra [TA] ...
valval, valvar
Relating to a valve.
valvate
Relating to or provided with a valve. SYN: valvular.
valve
1. A fold of the lining membrane of a canal or other hollow organ serving to retard or prevent a reflux of fluid. 2. Any formation or reduplication of tissue, or flaplike ...
Valve, aortic
One of the four valves in the heart, this valve is situated at exit of the left ventricle of the heart where the aorta (the largest of all arteries) begins. The aortic valve lets ...
Valve, bicuspid
One of the four valves of the heart, this one is situated between the left atrium and the left ventricle. It permits blood to flow one way only, from the atrium into the ...
Valve, mitral
One of the four valves of the heart, the mitral valve is situated between the left atrium and the left ventricle. It permits blood to flow one way: from the left atrium into the ...
Valve, pulmonary
One of the four valves in the heart, the pulmonary valve stands at the opening from the right ventricle in the pulmonary artery trunk. It lets blood head in the right direction ...
Valve, tricuspid
One of the four heart valves, the tricuspid valve is the first one that blood encounters as it enters the heart. The tricuspid valve is situated between the right atrium and ...
valveless
Without valves; denoting certain veins, such as the portal, that are not provided with valves as are most of the veins.
Valves, heart
There are four heart valves. All are one-way valves. Blood entering the heart first passes through the tricuspid valve and then the pulmonary valve. After returning from the ...
valviform
Valve-shaped.
valvoplasty
Surgical reconstruction of a deformed cardiac valve, for the relief of stenosis or incompetence. SYN: valvuloplasty. [valve + G. plastos, formed]
valvotomy
1. Cutting through a stenosed cardiac valve to relieve the obstruction. SYN: valvulotomy. 2. Incision of a valvular structure. [valve + G. tome, incision] - mitral v. ...
valvula
SYN: valvule. [Mod. L. dim. of valva] - Amussat v. SYN: posterior urethral valves, under valve. - valvulae anales [TA] SYN: anal valves, under valve. - v. bicuspidalis SYN: ...
valvular
SYN: valvate.
valvule
A valve, especially one of small size. SYN: valvula [TA]. [L. valvula] - Foltz v. SYN: Bochdalek valve. - lymphatic v. [TA] one of the delicate semilunar valves found in ...
valvulitis
Inflammation of a valve, especially a heart valve. [Mod. L. valvula, valve, + G. -itis, inflammation] - rheumatic v. v. characterized in the acute stage by small fibrin ...
valvuloplasty
SYN: valvoplasty.

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