Copy of `Dorland's Medical Dictionary`

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Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

pyogenic
(pi″o-jen´ik) producing pus.

pyogenic granuloma
a benign, solitary nodule resembling granulation tissue, found anywhere on the body, commonly in the oral cavity, usually at the site of trauma as a response of the tissues to a nonspecific infection. Called also granuloma telangiectaticum.

pyogenic infection
infection by pus-producing organisms, such as species of Staphylococcus or Streptococcus.

pyohemia
(pi″o-he´me-ә) pyemia.

pyohemothorax
(pi″o-he″mo-thor´aks) a pleural effusion containing pus and blood.

pyohydronephrosis
(pi″o-hi″dro-nә-fro´sis) the accumulation of pus and urine in the kidney.

pyometra
(pi″o-me´trә) an accumulation of pus within the uterus.

pyometritis
(pi″o-mә-tri´tis) purulent inflammation of the uterus.

pyomyoma
(pi″o-mi-o´mә) a leiomyoma that has undergone suppuration.

pyonephritis
(pi″o-nә-fri´tis) purulent inflammation of the kidney.

pyonephrosis
(pi″o-nә-fro´sis) suppurative destruction of the renal parenchyma, often with kidney failure. calculous pyonephrosis pus and calculi in the kidney.

pyopericarditis
(pi″o-per″ĭ-kahr-di´tis) purulent pericarditis.

pyopericardium
(pi″o-per″ĭ-kahr´de-әm) pus in the pericardium.

pyoperitoneum
(pi″o-per″ĭ-to-ne´әm) pus in the peritoneal cavity.

pyophthalmitis
(pi″of-thәl-mi´tis) purulent inflammation of the eye.

pyophysometra
(pi″o-fi″so-me´trә) pus and gas in the uterus.

pyopneumocholecystitis
(pi″o-noo″mo-ko″lә-sis-ti´tis) distention of the gallbladder, with the presence of pus and gas.

pyopneumohepatitis
(pi″o-noo″mo-hep″ә-ti´tis) abscess of the liver with pus and gas in the abscess cavity.

pyopneumopericardium
(pi″o-noo″mo-per″ĭ-kahr´de-әm) pus and gas in the pericardium.

pyopneumoperitonitis
(pi″o-noo″mo-per″ĭ-to-ni´tis) peritonitis with the presence of pus and gas.

pyopneumothorax
(pi″o-noo″mo-thor´aks) pus and air or gas within the pleural cavity; called also pneumopyothorax.

pyoptysis
(pi-op´tĭ-sis) expectoration of purulent matter.

pyopyelectasis
(pi″o-pi″ә-lek´tә-sis) dilatation of the renal pelvis with pus.

pyorrhea
(pi″o-re´ә) periodontitis.

pyosalpingitis
(pi″o-sal″pin-ji´tis) purulent salpingitis.

pyosalpingo-oophoritis
(pi″o-sal-ping″go-o″of-ә-ri´tis) purulent inflammation of the fallopian tube and ovary.

pyosalpinx
(pi″o-sal´pinks) an accumulation of pus in a fallopian tube.

pyostatic
(pi″o-stat´ik) stopping or hindering pus formation. an agent that has this effect.

pyostomatitis
(pi″o-sto″mә-ti´tis) a suppurative inflammation of the mouth.

pyothorax
(pi″o-tho´raks) empyema (def. 2).

pyoureter
(pi″o-u-re´tәr) pus in the ureter.

pyramid
(pir´ә-mid) a pointed or cone-shaped structure or part.

pyramid of cerebellum
pyramid of vermis.

pyramid of light
a triangular reflection seen upon the tympanic membrane.

pyramid of thyroid
an occasional third lobe of the thyroid gland, extending upward from the isthmus.

pyramid of tympanum
the hollow elevation in the inner wall of the middle ear that contains the stapedius muscle.

pyramid of vermis
the part of the vermis cerebelli between the tuber vermis and the uvula.

pyramid sign
pyramidal sign any sign pointing to disease of the pyramidal tract.

pyramidal
(pĭ-ram´ĭ-dәl) shaped like a pyramid.

pyramidal bone
triquetral bone.

pyramidal cataract
a conoid anterior polar cataract with its apex pointing forward.

pyramidal cell
a type of large multipolar pyramid-shaped cell found in the cerebral cortex, having one apical dendrite extending outward toward the surface and several dendrites; a few are inverted and have apical dendrites extending inward.

pyramidal fracture
pyramidal fracture of maxilla Le Fort II fracture.

pyramidal muscle of auricle
a prolongation of the fibers of the tragicus muscle to the spine of the helix.

pyramidal radiation
fibers extending from the pyramidal tract to the cortex.

pyramidal tracts
collections of motor nerve fibers arising in the brain and passing down through the spinal cord to motor cells in the anterior horns.

pyramidalis muscle
pyramidal muscle: origin, anterior aspect of pubis, anterior pubic ligament; insertion, linea alba; innervation, last thoracic nerve; action, tenses abdominal wall.

pyramids of medulla oblongata
two rounded masses, one on either side of the median fissure of the medulla oblongata, composed of motor fibers (called the pyramidal tract) from the cerebral cortex to the spinal cord and medulla oblongata. Pyramid of medulla oblongata.

pyran
(pi´ran) a cyclic compound in which the ring consists of 5 carbon atoms and 1 oxygen atom. Pyran.

pyranose
(pir´ә-nōs) a six-membered ring structure formed by the reaction of the carbonyl group and a hydroxy group of a sugar to form a hemiacetal.

pyrantel
(pĭ-ran´tәl) a broad-spectrum anthelmintic agent with activity against hookworms, pinworms, and roundworms; used as the pamoate or tartrate salt for infections due to Ascaris lumbricoides or Enterobius vermicularis.

pyrazinamide
(pir″ә-zin´ә-mīd) an antibacterial derived from nicotinic acid, used in treatment of tuberculosis.

pyretic
(pi-ret´ik) febrile (see fever). pyrogenic. pyrogen.

pyretogenesis
(pi″rә-to-jen´ә-sis) the origin and causation of fever.

pyretotherapy
(pi″rә-to-ther´ә-pe) treatment by artificially increasing the patient's body temperature. the treatment of fever.

pyrexia
(pi-rek´se-ә) fever. adj., pyrex´ial., adj.

Pyribenzamine
(pir″ĭ-ben´zә-mēn) trademark for preparations of tripelennamine, an antihistamine.

pyridine
(pir´ĭ-dēn) 1. a toxic, colorless, liquid hydrocarbon usually derived from coal tar and used as a laboratory and industrial intermediate.

Pyridium
(pĭ-rid´e-әm) trademark for preparations of phenazopyridine hydrochloride; a urinary tract analgesic.

pyridostigmine
(pir″ĭ-do-stig´mēn) an anticholinesterase; used as the bromide salt in the treatment of myasthenia gravis and as an antidote to nondepolarizing neuromuscular blocking agents such as tubocurarine.

pyridoxal
(pir″ĭ-dok´sәl) a form of vitamin B6.

pyridoxal phosphate
a coenzyme involved in amino acid metabolism.

pyridoxamine
(pir″ĭ-dok´sә-mēn) one of the three active forms of vitamin B6.

pyridoxine
(pēr″ĭ-dok´sēn) one of the forms of vitamin B6, used as the hydrochloride salt in the prophylaxis and treatment of vitamin B6 deficiency. It is also used in counteracting the neurotoxic effects of isoniazid and as an antidote to cycloserine.

pyridoxine-responsive anemia
a form of sideroblastic anemia in which there is a therapeutic response to pyridoxine; it affects predominately young or middle-aged males.

pyrilamine
(pә-ril´ә-mēn) an antihistamine, administered orally as the maleate and tannate salts, usually in a combination cold or cough product together with a decongestant.

pyrimethamine
(pir″ĭ-meth´ә-mēn) a folic acid antagonist used as an antimalarial agent, especially for suppressive prophylaxis, and also used concomitantly with a sulfonamide in treatment of toxoplasmosis.

pyrimidine
(pә-rim´ĭ-dēn) an organic compound that is the fundamental form of the pyrimidine bases, which include cytosine, thymine, and uracil.

pyrimidine bases
a group of chemical compounds of which pyrimidine is the base, including uracil, thymine, and cytosine, which are common constituents of nucleic acids.

pyrogen
(pi´ro-jәn) a substance that causes fever. endogenous pyrogen a low-molecular-weight protein that is produced by phagocytic leukocytes in response to stimulation by exogenous pyrogens; it is then released into the circulation, and it induces fever by acting on the preoptic area of t...

pyrogenic
(pi″ro-jen´ik) causing fever; called also pyretic.

pyroglobulin
(pi″ro-glob´u-lin) a monoclonal immunoglobulin that precipitates irreversibly upon heating to 56° C (as opposed to Bence Jones proteins, which precipitate but redissolve on cooling).

pyroglobulinemia
(pi″ro-glob″u-lin-e´me-ә) the presence of pyroglobulin in the blood, occurring most frequently in multiple myeloma, Waldenström macroglobulinemia, and other lymphoproliferative disorders; occasionally it is seen without any known associated disease.

pyroglutamic acid
(pi″ro-gloo-tam´ik) 5-oxoproline.

pyroglutamicaciduria
(pi″ro-gloo-tam″ik-as″ĭ-du´re-ә) 5-oxoprolinuria.

pyromania
(pi″ro-ma´ne-ә) an impulse control disorder consisting of a compulsion to set fires or watch fires, in the absence of monetary or other material gain to the person. The pyromaniac gets intense pleasure and emotional relief from these activities.

pyronin
(pi´ro-nin) a red aniline histologic stain.

pyrophobia
(pi″ro-fo´be-ә) irrational fear of fire.

pyrophosphatase
(pi″ro-fos´fә-tās) any enzyme that catalyzes the hydrolysis of central pyrophosphate linkages.

pyrophosphate
(pi″ro-fos´fāt) any salt of pyrophosphoric acid.

pyrophosphoric acid
(pi″ro-fos-for´ik) a dimer of phosphoric acid, H4P2O7.

pyrosis
(pi-ro´sis) heartburn. adj., pyrot´ic., adj.

pyroxylin
(pir-ok´sә-lin) a product of the action of a mixture of nitric and sulfuric acids on cotton; used to make collodion.

pyrrobutamine
(pir″o-bu´tah-min) an antihistamine.

pyrrole
(pir-ōl´) a toxic, basic, cyclic substance, obtained by destructive distillation of various animal substances and used in the manufacture of pharmaceuticals. Pyrrole. a substituted derivative of this structure. in general, a chemical derivative of t...

pyrrolidine
(pir-ol´ĭ-dēn) a simple base obtained from tobacco or prepared from pyrrole.

pyruvate
(pi´roo-vāt) a salt, ester, or anion of pyruvic acid. Pyruvate is the end product of glycolysis and may be metabolized to lactate or to acetyl CoA.

pyruvic acid
(pi-roo´vik) a compound formed in the body in aerobic metabolism of carbohydrate; also formed by dry distillation of tartaric acid.

pyrvinium
(pir-vin´e-um) an anthelmintic used for intestinal pinworms in the form of the pamoate salt.

pyuria
(pi-u´re-ә) pus in the urine.

PZI
protamine zinc insulin.

qi gong
(che´ kung´) (cultivation of qi, a type of vital energy that pervades the body, is the cause of physiologic processes, and must be kept in balance for good health) a broad range of practices, incorporating meditation, movement exercises, and breath control, whose purpose is to manipulate and develop qi; they range...

QRS complex
a group of waves seen on an electrocardiogram, representing ventricular depolarization. It actually consists of three distinct waves created by the passage of the cardiac electrical impulse through the ventricles and occurs at the beginning of each ventricular contraction. In a normal surface electrocardiogram the R wave is the upwar...

QRS wave
QRS complex.

QRST interval
Q–T interval in the electrocardiogram, the length of time between ventricular depolarization (the Q wave) and repolarization (the T wave); it begins with the onset of the QRS complex and ends with the end of the T wave.

qt
quart.

quack
(kwak) one who misrepresents ability and experience in diagnosis and treatment of disease or the effects to be achieved by treatment.

quackery
(kwak´әr-e) the practice or methods of a quack.

quadrangular
(kwod-rang´gu-lәr) having four angles; see quadrilateral (def. 1).

quadrangular fontanelle
anterior fontanelle.