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plica
[TA] SYN: fold (1). [Mod. L. a plait or fold] - plicae adiposae pleurae SYN: fatty folds of pleura, under fold. - plicae alares plicae synovialis infrapatellaris SYN: alar folds ...
plicate
Folded; pleated; tucked.
plication
A folding or putting together in pleats; specifically, an operation for reducing the size of a hollow viscus by taking folds or tucks in its walls. [L. plico, pp. -atus, to fold]
plicotomy
Division of the posterior malleolar fold. [plica + G. tome, incision]
ploidy
The number of haploid sets in a cell. Gametes normally contain one; somatic cells two. SEE ALSO: polyploidy. [ -ploid + -y, condition]
plombage
Formerly, the use of an inert material in collapse of the lung in the surgical treatment of pulmonary tuberculosis. [Fr. lit. lead-work]
plosive
Speech sound made by impounding the air stream for a moment and then suddenly releasing it.
plot
A graphical representation. - double-reciprocal p. a graphic representation of enzyme kinetic data in which 1/v (on the vertical axis), where v is the initial velocity, is ...
PLP
Abbreviation for pyridoxal 5-phosphate; parathyroid hormonelike protein.
PLP (proteolipid protein)
The most abundant protein of the myelin sheath (the covering of the nerves) in the central nervous system (CNS). The gene that codes for PLP is on the X chromosome. Mutations in ...
plug
Any mass filling a hole or closing an orifice. - Dittrich plugs minute, dirty-grayish, ill-smelling masses of bacteria and fatty acid crystals in the sputum in pulmonary ...
plugger
A dental instrument used for condensing gold (foil), amalgam, or any plastic material in a cavity; operated by hand or by mechanical means. SYN: packer (2), plugging ...
plumbago
SYN: graphite. [L. p., black lead]
plumbic
1. Relating to or containing lead. 2. Denoting the higher valence of the lead ion, Pb4+. [L. plumbum, lead]
plumbism
SYN: lead poisoning. [L. plumbum, lead]
plumbum
SYN: lead. [L.]
Plummer
Henry S., U.S. physician, 1874–1937. See P. disease, P.- Vinson syndrome.
Plummer’s disease
Toxic multinodular goiter. Also called Parry’s disease.
plumose
Feathery. [L. pluma, feather]
pluri-
Several, more. SEE ALSO: multi-, poly-. [L. plus, pluris]
pluricausal
Having two or more causes; used in reference to the etiology of a disease; often indicates that a given disease develops only when two or more causative factors are operative ...
pluriglandular
Denoting several glands or their secretions. SYN: multiglandular, polyglandular.
plurilocular
SYN: multilocular.
plurinuclear
SYN: multinuclear.
pluripotent, pluripotential
1. Having the capacity to affect more than one organ or tissue. 2. Not fixed as to potential development. SEE ALSO: p. cells, under cell.
pluriresistant
Having multiple aspects of resistance.
plutomania
A delusion that one has great wealth. [G. ploutos, wealth, + mania, frenzy]
plutonism
Effects produced, as demonstrated in experimental animals, by means of exposure to the radioactive element plutonium present in atomic piles; they consist of hepatic damage, ...
plutonium
A transuranium artificial radioactive element, atomic no. 94, atomic wt. 244.064. The best-known α-emitting isotope is 239Pu (half-life 24,110 years) which, like 235U, is ...
Pm
Symbol for promethium.
pM
Abbreviation for picomolar (10−12 M).
pm
Symbol for picometer.
PMD (Pelizaeus-Merzbacher disease)
An X-linked disorder of the central nervous system (CNS) in which there is loss of myelin (the sheath around the nerve protecting it). PMD affects boys and is characterized by ...
PML
Stands for progressive multifocal leukoencephalopathy, a rapidly progressive, often fatal viral infection of the brain. Commonly abbreviated as PML. PML is believed to be due ...
pmol
Abbreviation for picomole.
PMR
Abbreviation for proportional mortality ratio.
PMR (Polymyalgia Rheumatica)
A disorder of the muscles and joints of older persons characterized by pain and stiffness, affecting both sides of the
PMS
Abbreviation for premenstrual syndrome.
PMS (PreMenstrual Syndrome)
A combination of emotional, physical, psychological, and mood disturbances that occur after ovulation and normally end with the onset of the menstrual flow.
pneo-
Combining form denoting breath or respiration. SEE ALSO: pneum-, pneumo-. [G. pneo, to breathe]
pneum-, pneuma-, pneumat-, pneumato-
Presence of air or gas, the lungs, or breathing. SEE ALSO: pneo-, pneumo-. [G. pneuma, pneumatos, air, breath]
pneuma
In ancient Greek philosophy and medicine : 1. Air or an all-pervading fiery essence in the air (which today would be identified with oxygen), which was the creative and animating ...
pneumarthrogram
Film records of pneumarthrography.
pneumarthrography
Radiographic examination of a joint following the introduction of air, with or without another contrast medium.
pneumarthrosis
Presence of air in a joint. [G. pneuma, air, + arthron, joint, + -osis, condition]
pneumatic
1. Relating to air or gas, or to a structure filled with air. 2. Relating to respiration. [G. pneumatikos]
pneumatic antishock garment
An inflatable suit used to apply pressure to the peripheral circulation, thus reducing blood flow and fluid exudation into tissues, to maintain central blood flow in the presence ...
Pneumatic larynx
: A device that uses air to produce sound, helping a person whose larynx has been removed to talk.
pneumatics
The science concerned with the physical properties of air or gases. [G. pneuma, air or gas]
pneumatism
The doctrine of the pneumatists.
pneumatists
Followers of the school whose physiology centered on the pneuma and who conceived the causes of disease as disturbances of this vital principle.
pneumatization
The development of air cells such as those of the mastoid and ethmoidal bones. [G. pneuma, air]
pneumatized
Containing air.
pneumato-
See pneum-.
pneumatocardia
Presence of air bubbles or gas in the blood of the heart; produced by air embolism.
pneumatocele
1. An emphysematous or gaseous swelling. 2. SYN: pneumonocele. 3. A thin-walled cavity within the lung, one of the characteristic sequelae of staphylococcus pneumonia and ...
pneumatoenteric
SYN: celomic bay.
pneumatohemia
SYN: pneumohemia.
pneumatometer
Obsolete term for spirometer.
pneumatorrhachis
SYN: pneumorrhachis. [G. pneuma, air, + rhachis, spine]
pneumatoscope
1. Obsolete term for an instrument for measuring the extent of the respiratory excursions of the chest. 2. Obsolete term for an instrument for use in auscultatory percussion, ...
pneumatosis
Abnormal accumulation of gas in any tissue or part of the body. [G. a blowing out] - p. coli a usually benign condition in which gas is seen radiographically in the wall of the ...
pneumaturia
The passage of gas or air from the urethra during or after urination, resulting from infected urine or, more commonly, from an intestinal fistula. [G. pneuma, air, + ouron, ...
pneumatype
A device for determining the patency of the nasal fossae by exhaling through the nose against a plate of cooled glass. [G. pneuma, breath, + typos, type]
Pneumo-
Prefix pertaining to breathing, respiration, the lungs, pneumonia, or air.
pneumo-, pneumon-, pneumono-
The lungs, air or gas, respiration, or pneumonia. SEE ALSO: aer-, pneo-, pneum-. [G. pneumon, pneumonos, lung]
pneumo-orbitography
Radiographic visualization of the orbital contents following injection of a gas, usually air.
pneumoarthrography
Radiography of a joint after injection of air and usually a water-soluble contrast medium. [G. pneuma, air, + arthron, joint, + grapho, to write]
pneumobacillus
SYN: Klebsiella pneumoniae.
pneumobulbar
Relating to the lungs and their connection with the medulla oblongata by way of the vagus nerve. [G. pneumon, lung, + L. bulbus, bulb]
pneumocardial
SYN: cardiopulmonary.
pneumocele
SYN: pneumonocele. - extracranial p. SYN: extracranial pneumatocele. - intracranial p. SYN: intracranial pneumatocele.
pneumocentesis
SYN: pneumonocentesis.
pneumocephalus
Presence of air or gas within the cranial cavity. [G. pneuma, air, + kephale, head]
pneumocholecystitis
Cholecystitis with gas-forming organisms giving rise to gas in the gallbladder.
pneumococcal
Pertaining to or containing the pneumococcus.
Pneumococcal immunization
Vaccination to help prevent infection by Streptococcus pneumoniae, also known as the pneumococcus bacterium. This bacterium causes one of the most common and severe forms of ...
pneumococcemia
The presence of pneumococci in the blood. [ pneumococcus + G. haima, blood]
pneumococcidal
Destructive to pneumococci. [ pneumococcus + L. caedo, to kill]
pneumococcolysis
Lysis or destruction of pneumococci. [ pneumococcus + G. lysis, dissolution]
pneumococcosis
Rarely used term for infection with pneumococci.
pneumococcosuria
The presence of pneumococci or their specific capsular substance in the urine. [ pneumococcus + G. ouron, urine]
pneumococcus
SYN: Streptococcus pneumoniae. [G. pneumon, lung, + kokkos, berry (coccus)] - Fraenkel p. SYN: Streptococcus pneumoniae.
Pneumococcus (Streptococcus pneumoniae)
A type of bacterium that comes in pairs and is shaped like a lancet (a surgical knife with a short wide two-edged blade). Pneumococcus is the leading cause of bacterial ...
pneumocolon
Gas in the colon or interstitial gas in the wall of the colon. [G. pneuma, air, + kolon, colon]
Pneumoconiosis
Deposition of particulate matter (such as asbestos and silicon) in the lungs.
Pneumoconiosis, coal miner’s
Also known as black lung disease, this lung disorder is the direct result of coal mining. The silica mineral and carbon in the dust raised by coal mining can cause a serious ...
pneumoconiosis, pneumokoniosis
Inflammation commonly leading to fibrosis of the lungs caused by the inhalation of dust incident to various occupations; characterized by pain in the chest, cough with little or ...
pneumocranium
Air present between the cranium and the dura mater; the term is commonly used to indicate extradural or subdural air. [G. pneuma, air, + kranion, skull]
Pneumocystis carinii
The eukaryotic microorganism responsible for interstitial pneumonia in immunocompromised patients. The exact taxonomic position remains unclear, as the organism has ...
Pneumocystis carinii pneumonia (PCP)
A parasitic infection of the lungs that is particularly common and life-threatening in immunosuppressed persons.
pneumocystography
Radiography of the bladder following injection of air. [G. pneuma, air, + kystis, bladder, + grapho, to write]
pneumocystosis
SYN: Pneumocystis carinii pneumonia.
pneumocyte
SYN: alveolar cell. [ pneumo- + G. kytos, cell]
pneumoderma
SYN: subcutaneous emphysema. [G. pneuma, air, + derma, skin]
pneumodynamics
The mechanics of respiration. [G. pneuma, breath, + dynamis, force]
pneumoempyema
A rarely used term for pyopneumothorax.
pneumoencephalogram
Radiographs obtained by pneumoencephalography.
pneumoencephalography
Radiographic visualization of cerebral ventricles and subarachnoid spaces by use of gas such as air; no longer used because of CT and MRI. [G. pneuma, air, + enkephalos, brain, ...
pneumogastric
1. Relating to the lungs and the stomach. 2. Obsolete term denoting the nervus vagus. SYN: gastropneumonic, gastropulmonary. [G. pneumon, lung, + gaster, stomach]
pneumogastrography
Rarely used radiographic study of stomach after injection of air. [G. pneuma, air, + gaster, stomach, + grapho, to write]
pneumogram
1. The record or tracing made by a pneumograph. 2. Radiographic record of pneumography. [G. pneumon, lung, + gramma, a drawing]
pneumograph
Generic term for any device that records respiratory excursions from movements on the body surface; e.g., an impedance p., which applies the principles of impedance ...
pneumography
1. Examination with a pneumograph. 2. A general term indicating radiography after injection of air. SYN: pneumoradiography, pneumoroentgenography. [G. pneumon, lung, + grapho, ...
pneumohemia
Presence of air in blood vessel s. SEE ALSO: air embolism. SYN: pneumatohemia. [G. pneuma, air, + haima, blood]
pneumohemopericardium
SYN: hemopneumopericardium.
pneumohemothorax
SYN: hemopneumothorax.
pneumohydrometra
The presence of gas and serum in the uterine cavity. [G. pneuma, air, + hydor (hydr-), water, + metra, uterus]
pneumohydropericardium
SYN: hydropneumopericardium.
pneumohydroperitoneum
SYN: hydropneumoperitoneum.
pneumohydrothorax
SYN: hydropneumothorax.
pneumohypoderma
SYN: subcutaneous emphysema. [G. pneuma, air, + hypo, beneath, + derma, skin]
pneumokoniosis
See pneumoconiosis.
pneumolith
A calculus in the lung. SYN: pulmolith. [G. pneumon, lung, + lithos, stone]
pneumolithiasis
Formation of calculi in the lungs.
pneumology
A rarely used term for the study of diseases of the lung and air passages. [G. pneuma, lung, + logos, study]
pneumolysis
Surgical separation of the lung and costal pleura from the endothoracic fascia; formerly used in collapse therapy for tuberculosis. [G. pneumon, lung, + lysis, a loosening]
pneumomalacia
Softening of the lung tissue. [G. pneumon, lung, + malakia, softness]
pneumomassage
Compression and rarefaction of the air in the external auditory meatus, causing movement of an intact tympanic membrane. [G. pneuma, air, + massage]
Pneumomediastinum
Free air in the mediastinum (space betweens the lungs) which may give rise to pneumothorax or pneumopericardium and compromise the lungs or heart. * * * Abnormal presence of ...
pneumomelanosis
Blackening of the lung tissue from the inhalation of coal dust or other black particles. SEE ALSO: anthracosis. SYN: pneumonomelanosis. [G. pneumon, lung, + melanosis, a ...
pneumomycosis
Obsolete term denoting any disease of the lungs caused by the presence of fungi. [G. pneumon, lung, + mykes, fungus]
pneumomyelography
Rarely used radiographic examination of spinal canal after injection of air or gas into the subarachnoid space. [G. pneuma, air, + myelos, marrow, + grapho, to write]
pneumon-
See pneumo-.
pneumonectomy
Removal of an entire lung. SYN: pulmonectomy. [G. pneumon, lung, + ektome, excision]
pneumonia
Inflammation of the lung parenchyma characterized by consolidation of the affected part, the alveolar air spaces being filled with exudate, inflammatory cells, and fibrin. Most ...
pneumonic
1. SYN: pulmonary. 2. Relating to pneumonia.
pneumonitis
Inflammation of the lungs. SEE ALSO: pneumonia. SYN: pulmonitis. [G. pneumon, lung, + -itis, inflammation] - acute interstitial p. usually considered a form of hypersensitivity ...
Pneumonitis, radiation
Inflammation of the lungs as a result of radiation. Although the radiation can be from various sources including accidents, today it is usually from radiation therapy. Radiation ...
pneumono-
See pneumo-.
pneumonocele
Protrusion of a portion of the lung through a defect in the chest wall. SYN: pleurocele, pneumatocele (2), pneumocele.
pneumonocentesis
Rarely used term for paracentesis of the lung. SYN: pneumocentesis. [G. pneumon, lung, + kentesis, puncture]
pneumonococcal
Relating to or associated with Streptococcus pneumoniae.
pneumonococcus
SYN: Streptococcus pneumoniae.
pneumonocyte
Nonspecific term referring to cells lining alveoli in the respiratory part of the lung. [G. pneumon, lung, + kytos, cell] - granular pneumonocytes SYN: great alveolar cells, ...
pneumonokoniosis
See pneumonoconiosis.
pneumonomelanosis
SYN: pneumomelanosis.
pneumonopathy
Disease of the lung. - eosinophilic p. SYN: eosinophilic pneumonia.
pneumonopexy
Fixation of the lung by suturing the parietal and visceral pleurae or otherwise causing adhesion of the two layers. SYN: pneumopexy. [G. pneumon, lung, + pexis, fixation]
pneumonopleuritis
SYN: pleuritic pneumonia.
pneumonorrhaphy
Suture of the lung. [G. pneumon, lung, + rhaphe, suture]
pneumonotomy
Incision of the lung. SYN: pneumotomy. [G. pneumon, lung, + tome, incision]
Pneumopericardium
Air between the heart and the pericardium, the membrane wrapped around the heart. * * * Presence of gas (usually air) in the pericardial sac. [G. pneuma, air, + pericardium] - ...
pneumoperitoneum
Presence of air or gas in the peritoneal cavity as a result of disease, or produced artificially in the abdomen to achieve exposure during laporoscopic surgery. [G. pneuma, air, ...
pneumoperitonitis
Inflammation of the peritoneum with an accumulation of gas in the peritoneal cavity. [G. pneuma, air, + peritonitis]
pneumopexy
SYN: pneumonopexy.
pneumophagia
SYN: aerophagia.
pneumopleuritis
Pleurisy with air or gas in the pleural cavity. [G. pneuma, air, + pleur- + -itis, inflammation]
pneumopyelography
Radiography of the kidney after air or gas has been injected into the renal pelvis. [G. pneuma, air, + pyelos, pelvis, + grapho, to write]
pneumoradiography
SYN: pneumography (2).
pneumoresection
Excision of part of a lung. [G. pneumon, lung, + resection]
pneumoretroperitoneum
Pathologic presence of air in the retroperitoneal tissues.
pneumoroentgenography
SYN: pneumography (2).
pneumorrhachis
The presence of gas in the spinal canal. SYN: pneumatorrhachis. [G. pneuma, air, + rhachis, spinal column]
pneumoscope
SYN: pneumatoscope.
pneumoserothorax
SYN: hydropneumothorax.
pneumosilicosis
SYN: silicosis.
pneumotachogram
A recording of respired gas flow as a function of time, produced by a pneumotachograph. [G. pneuma, air, + tachys, swift, + gramma, something written]
pneumotachograph
An instrument for measuring the instantaneous flow of respiratory gases. SYN: pneumotachometer. - Fleisch p. a p. that measures flow in terms of the proportional pressure drop ...
pneumotachometer
SYN: pneumotachograph. [G. pneuma, air, + tachys, swift, + metron, measure]
pneumothermomassage
Application to the body of hot air under varying degrees of pressure. [G. pneuma, air, + therme, heat, + Fr. massage]
pneumothorax
The presence of free air or gas in the pleural cavity. [G. pneuma, air, + thorax] - artificial p. p. produced by the injection of air, or a more slowly absorbed gas such as ...
pneumotomy
SYN: pneumonotomy.
pneumoventricle
Air in the ventricular system of the brain; occurs as a complication of a fracture of the skull that passes through the accessory nasal sinuses.
Pneumovirus
A genus of viruses (family Paramyxoviridae) including respiratory syncytial virus, which causes severe lower respiratory tract disease in infants. Nucleocapsids are 13–15 nm ...
pneusis
SYN: breathing. [G. pneo, to breathe]
pnigophobia
Morbid fear of choking. [G. pnigos, choking, + phobos, fear]
PNL (percutaneous nephrolithotripsy)
A technique for removing large and/or dense stones and staghorn stones. PNL is done via a port created by puncturing the kidney through the skin and enlarging the access port to 1 ...
PNMT
Abbreviation for phenylethanolamine N-methyltransferase.
PNP
Abbreviation for psychogenic nocturnal polydipsia.
PNPB
Abbreviation for positive-negative pressure breathing.
PNS (peripheral nervous system)
That portion of the nervous system that is outside the brain and spinal cord. The peripheral nervous system (PNS) is one of the two major divisions of the nervous system. The ...
PO
Abbreviation for per os.
Po
Symbol for polonium.
Po2, pO2
Symbol for the partial pressure (tension) of oxygen. See partial pressure.
pock
The specific pustular cutaneous lesion of smallpox. [A.S. poc, a pustule]
pocket
1. A cul-de-sac or pouchlike cavity. 2. A diseased gingival attachment; a space between the inflamed gum and the surface of a tooth, limited apically by an epithelial ...
pockmark
The small depressed scar left after the healing of the smallpox pustule.
poculum
SYN: cup (1). [L.] - p. diogenis SYN: cup of palm.
pod-, podo-
Foot, foot-shaped. Cf.:ped-. [G. pous, podos]
podagra
Severe pain in the foot, especially that of typical gout in the great toe. [G. fr. pous, foot, + agra, a seizure]
podagral, podagric, podagrous
Relating to or characterized by podagra.
podalgia
Pain in the foot. SYN: pododynia, tarsalgia. [pod- + G. algos, pain]
podalic
Relating to the foot. [G. pous (pod-), foot]
podarthritis
Inflammation of any of the tarsal or metatarsal joints. [pod- + arthritis]
podedema
Edema of the feet and ankles.
podiatric
Relating to podiatry.
Podiatrist
A podiatrist is a physician that specializes in the evaluation and treatment of diseases of the foot. The modern specialty of Podiatric Medicine and Surgery requires a minimum ...
podiatry
The specialty concerned with the diagnosis and/or medical, surgical, mechanical, physical, and adjunctive treatment of the diseases, injuries, and defects of the human foot. SYN: ...
podismus
SYN: podospasm.
poditis
An inflammatory disorder of the foot. [pod- + G. -itis, inflammation] - tourniquet p. postischemic acute inflammatory edema in the foot (or paw), as the result of complete ...
podo-
See pod-.
podobromidrosis
Foul-smelling perspiration of the feet. [ podo- + G. bromos, a foul smell, + hidros, sweat]
podocyte
An epithelial cell of the visceral layer of Bowman capsule in the renal corpuscle, attached to the outer surface of the glomerular capillary basement membrane by cytoplasmic ...
pododynamometer
An instrument for measuring the strength of the muscles of the foot or leg. [ podo- + G. dynamis, force, + metron, measure]
pododynia
SYN: podalgia. [ podo- + G. odyne, pain]
podofilox
An antimitotic agent derived from species of Juniperus and Podophyllum; used to treat external genital and perianal warts.
podogram
An imprint of the sole of the foot, showing the contour and the condition of the arch, or an outline tracing. [ podo- + G. gramma, written]
podograph
A device for taking an outline at the foot and an imprint of the sole. [ podo- + G. grapho, to write]
podolite
SYN: dahllite.
podologist
SYN: podiatrist.
podology
SYN: podiatry. [ podo- + G. logos, study]
podomechanotherapy
Treatment of foot conditions with mechanical devices; e.g., arch supports, orthoses.
podometer
SYN: pedometer. [ podo- + G. metron, measure]
podophyllin
SYN: podophyllum resin.
podophyllotoxin
A toxic polycyclic substance, C22H22O8, with cathartic properties present in podophyllum; has antineoplastic action.
podophyllum
The rhizome of P. peltatum (family Berberidaceae), used as a powerful laxative. SYN: May apple, vegetable calomel. - Indian p. the dried rhizome and roots of P. emodi, a ...
podospasm, podospasmus
Spasm of the foot. SYN: podismus. [ podo- + G. spasmos, spasm]
Podoviridae
Name for a family of bacterial viruses with short tails and genomes of double-stranded DNA (MW 12–73 × 106); heads may be isometric or elongated. The family includes the T-7 ...
POEMS
Acronym for polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes. See P. syndrome. SYN: Crow-Fukase syndrome.
pogoniasis
A rarely used term for the growth of a beard on a woman, or excessive hairiness of the face in men. SEE ALSO: hirsutism. [G. pogon, beard, + -iasis, condition]
pogonion
In craniometry, the most anterior point on the mandible in the midline; the most anterior, prominent point on the chin. SYN: mental point. [G. dim. of pogon, beard]
Pogonomyrmex
A genus of ants that attack humans and small animals. SYN: harvester ant. [G. pogon, beard, + myrmex, ant]
pOH
The negative decadic logarithm of the OH− concentration (in moles per liter).
poietin
Suffix used with words to indicate an agent with a stimulatory effect on growth or multiplication of cells, such as erythropoietin, and others. [G. poietes, maker, + -in]
poikilo-
Irregular, varied. [G. poikilos, many colored, varied]
poikiloblast
A nucleated red blood cell of irregular shape. [ poikilo- + G. blastos, germ]
poikilocyte
A red blood cell of irregular shape. [ poikilo- + G. kytos, cell]
poikilocythemia
SYN: poikilocytosis. [ poikilocyte + G. haima, blood]
poikilocytosis
The presence of poikilocytes in the peripheral blood. SYN: poikilocythemia. [ poikilocyte + G. -osis, condition]
poikilodentosis
Hypoplastic defects or mottling of enamel due to excessive fluoride in the water supply. [ poikilo- + L. dens, tooth, + G. -osis, condition]
poikiloderma
A variegated hyperpigmentation and telangiectasia of the skin, followed by atrophy. [ poikilo- + G. derma, skin] - p. atrophicans and cataract SYN: Rothmund syndrome. - p. ...
Poikiloderma atrophicans with cataract
Better known as the Rothmund-Thomson syndrome, this is an hereditary disease characterized by progressive degeneration (atrophy), scarring and abnormal pigmentation of the skin ...
Poikiloderma congenita
Better known as the Rothmund-Thomson syndrome, this is an hereditary disease characterized by progressive degeneration (atrophy), scarring and abnormal pigmentation of the skin ...
poikilotherm
A poikilothermic animal. SYN: allotherm, cold-blooded animal.
poikilothermic, poikilothermal, poikilothermous
1. Varying in temperature according to the temperature of the surrounding medium; denoting the so-called cold-blooded animals, such as the reptiles and amphibians, and the ...
poikilothermy, poikilothermism
The condition of plants and cold-blooded animals, the temperature of which varies with the changes in the temperature of the surrounding medium. [ poikilo- + G. therme, heat]
poikilothrombocyte
A blood platelet of abnormal shape. [ poikilo- + G. thrombos, clot, + kytos, cell]
poikilothymia
A rarely used term for a mental state marked by abnormal variations in mood. [ poikilo- + G. thymos, mind]
point
1. SYN: punctum. 2. A sharp end or apex. 3. A slight projection. 4. A stage or condition reached, as the boiling p. 5. To become ready to open, said of an abscess or boil the ...
Point mutation
A single nucleotide base change in the DNA. A point mutation may consist of the loss of a nucleotide, the insertion of an additional nucleotide, or the substitution of one ...
point source
In photometry, a very small source of light that is regarded as a geometric point from which light emanates in straight lines in all directions.
Point, McBurney's
McBurney's point is the most tender area of the abdomen of patients in the early stage of appendicitis. McBurney's point is named after the 19th-century New York surgeon Charles ...
pointillage
A massage manipulation with the tips of the fingers. [Fr. dotting, stippling]
pointing
Preparing to open spontaneously, said of an abscess or a boil.
Poirier
Paul J., French surgeon, 1853–1907. See P. gland, P. line.
poise
In the CGS system, the unit of viscosity equal to 1 dyne-second per square centimeter and to 0.1 pascal-second. [J.-L. M. Poiseuille]
Poiseuille
Jean Léonard Marie, French physiologist and physicist, 1799–1869. See poise, P. viscosity coefficient, P. law, P. space.
Poison
Any substance that can cause severe distress or death if ingested, breathed in, or absorbed through the skin. Many substances that normally cause no problems, including water and ...
Poison Control Center
Special information centers set up to inform Americans about how to respond to potential poisoning. These centers maintain a database of poisons and appropriate emergency ...
Poison ivy
: Skin inflammation resulting from contact with oils from the poison ivy vine. Chemicals produced by this vine cause an immune reaction, producing redness, itching, and ...
poison ivy, poison oak, poison sumac
1. See Toxicodendron. 2. Common name for the cutaneous eruption (rhus dermatitis) caused by contact with these species of Toxicodendron.
Poison oak
: Poison oak is a form of "contact dermatitis" or inflammation of the skin resulting from chemicals produced from the poison oak plant contacting the skin. The chemicals ...
Poisoning
Taking a substance that is injurious to health or can cause death. Poisoning is still a major hazard to children, despite child-resistant (and sometimes adult-resistant) packaging ...
Poisoning, alcohol
A condition in which a toxic amount of alcohol (ethanol, ethyl alcohol) has been drunk, usually in a short period of time. The toxicity is related to the blood level of the ...
Poisoning, antifreeze
Poisoning from antifreeze which today is usually ethylene glycol — a clear, colorless, odorless liquid with a sweet taste — that can produce dramatic and dangerous toxicity. ...
Poisoning, carbon monoxide
Poisoning with carbon monoxide, a tasteless odorless gas and byproduct of combustion that competes with oxygen binding sites on the hemoglobin molecule. Chronic carbon ...
Poisoning, ethylene glycol
Poisoning from ethylene glycol (a clear, colorless, odorless liquid with a sweet taste) that can produce dramatic and dangerous toxicity. Ethylene glycol is found most commonly ...
Poisoning, lead
An environmental hazard capable of causing brain damage. In the US lead poisoning is formally defined as having at least 10 micrograms of lead per deciliter of blood. (The ...
Poisoning, mercury
The metallic element mercury is poisonous to humans. Mercury poisoning can occur in both acute and chronic forms. Acute mercury poisoning (which today is less common) is ...
Poisoning, silver
Silver poisoning, medically termed argyria, causes ashen gray discoloration of the skin (and other tissues of the body). Due to chronic use of silver salts. For example, a ...
poisonous
Characterized by, having the characteristics of, or containing a poison. SYN: toxic (1), toxicant (1), toxiferous, venenous.
Poisson
Siméon Denis, French mathematician, 1781–1840. See P. distribution, P.- Pearson formula.
Poland anomaly
A unique pattern of one-sided malformations characterized by a defect of the chest (pectoralis) muscle on one side of the body and webbing of the fingers (cutaneous syndactyly) ...
Poland sequence
A unique pattern of one-sided malformations characterized by a defect of the chest (pectoralis) muscle on one side of the body and webbing of the fingers (cutaneous syndactyly) ...
Poland syndactyly
A unique pattern of one-sided malformations characterized by a defect of the chest (pectoralis) muscle on one side of the body and webbing of the fingers (cutaneous syndactyly) ...
Poland syndrome
A developmental disorder of the chest wall involving a unique pattern of one-sided malformations characterized by a defect (absence or underdevelopment) of the main chest muscle ...
polar
1. Relating to a pole. 2. Having poles, said of certain nerve cells having one or more processes. [Mod. L. polaris, fr. polus, pole]
polarimeter
An instrument for measuring the angle of rotation in polarization or the amount of polarized light. [Mod. L. polaris, polar, + G. metron, measure]
polarimetry
Measurement by polarimeter.
polariscope
An instrument for studying the phenomena of the polarization of light. [Mod. L. polaris, polar, + G. skopeo, to examine]
polariscopic
Relating to the polariscope or to polariscopy.
polariscopy
Use of the polariscope in studying properties of polarized light.
polarity
1. The property of having two opposite poles, as that possessed by a magnet. 2. The possession of opposite properties or characteristics. 3. The direction or orientation of ...

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