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

empty sella syndrome
(emp´te sel´ә) a syndrome diagnosed radiologically in which the diaphragm of the sella turcica is vestigial, the sella turcica forms an extension of the subarachnoid space and is filled with cerebrospinal fluid, and the pituitary fossa appears to be empty, although the pituitary gland is present in a flatten...

empyema
(em″pi-e´mә) abscess. a pleural effusion containing pus; it occurs as an occasional complication of pleurisy or some other respiratory disease. Symptoms include dyspnea, coughing, chest pain on one side, malaise, and fever. Called also pyothorax. See also pleurisy.

empyematic scoliosis
empyemic scoliosis scoliosis caused by empyema.

empyesis
(em″pi-e´sis) a pustular eruption.

empyreumatic oil
a volatile oil formed by the destructive distillation of organic material.

EMT
emergency medical technician.

emulgent
(e-mul´jәnt) causing a straining or purifying process.

emulsification
(e-mul″sĭ-fĭ-ka´shәn) the converting of something into an emulsion.

emulsifier
(e-mul´sĭ-fi″әr) a substance used to make an emulsion.

emulsifying agent
emulsifier.

emulsion
(e-mul´shәn) a mixture of two immiscible liquids, one being dispersed throughout the other in small droplets; a colloid system in which both the dispersed phase and the dispersion medium are liquids. Margarine, cold cream, and various medicated ointments are emulsions. In some emulsions the suspended particl...

emulsion colloid
lyophilic colloid. rarely, emulsion.

emulsoid
(e-mul´soid) lyophilic colloid. rarely, emulsion.

emunctory
(e-munk´tә-re) excretory or cleansing. an excretory organ or duct.

enalapril
(ә-nal´ә-pril) an angiotensin-converting enzyme inhibitor, used as enalapril maleate in the treatment of hypertension, congestive heart failure, and asymptomatic left ventricular dysfunction.

enalaprilat
(ә-nal´ә-pril-at″) an angiotensin-converting enzyme inhibitor, the active metabolite of enalapril, administered intravenously in the treatment of hypertensive crisis or when oral administration of enalapril maleate is impractical.

enamel
(ә-nam´әl) the white, compact, and very hard substance covering and protecting the dentin of the crown of a tooth. mottled enamel a chronic endemic form of hypoplasia of the dental enamel caused by drinking water with a high fluoride content when a child is in the tim...

enamel cell
ameloblast.

enamel cuticle
primary cuticle.

enamel layer
the outermost layer of cells of the enamel organ.

enamel organ
a process of epithelium forming a cap over a dental papilla and developing into the enamel.

enanthate
(ә-nan´thāt) USAN contraction for heptanoate.

enanthema
(en″әn-the´mә) pl. enanthemas, enanthe´mata an eruption on a mucous surface. adj., enanthem´atous., adj.

enantiomer
(en-an´te-o″mәr) one of a pair of isomeric compounds whose molecular structures are mirror images of each other.

enantiomerism
(en-an″te-om´әr-iz-әm) the relationship between two stereoisomers having molecules that are mirror images of each other; enantiomers have identical chemical and physical properties in an achiral environment but form different products when reacted with other chiral molecules and exhibit optical activit...

enantiomorph
(en-an´te-o-morf″) enantiomer. either of two crystals exhibiting enantiomerism. adj., enantiomor´phic., adj.

enarthrosis
(en″ahr-thro´sis) a joint in which the rounded head of one bone is received into a socket in another, permitting motion in any direction; called also ball-and-socket joint.

encainide
(en-ka´nīd) a sodium channel blocking agent that acts on the Purkinje fibers and myocardium; used as the hydrochloride salt in treatment of life-threatening arrhythmias.

encapsulation
(әn-kap″su-la´shәn) enclosure within a capsule.

encasing cell
cover cell.

encephalatrophy
(en-sef″ә-lat´ro-fe) atrophy of the brain.

encephalic
(en″sә-fal´ik) pertaining to the brain. within the skull.

encephalic trunk
brainstem.

encephalic vesicles
brain vesicles.

encephalitis
(en-sef″ә-li´tis) pl. encephali´tides Inflammation of the brain; there are many types, depending on the causative agent and the structures involved. A large percentage are caused by viruses; some are transmitted from animals to humans, as in equine encephalitis, and some between humans, as in herpes encephali...

encephalitis A
lethargic e.

encephalitis lethargica
(en-sef″ә-li´tis lә-thahr´jĭ-kә) lethargic encephalitis.

encephalitis periaxialis diffusa
(en-sef″ә-li´tis per″e-ak″se-a´lis dĭ-fu´sә) Schilder disease.

encephalitogenic
(en-sef″ә-lit-o-jen´ik) causing encephalitis.

encephalitogenic protein
myelin basic protein.

Encephalitozoon
(en″sә-fal″ĭ-to-zo´on) a genus of parasitic protozoa (suborder Apansporoblastina, order Microsporida). E. cuni´culi is the most common species, seen mainly in rabbits, rodents, cats, and dogs; in humans it attacks primarily the brain and kidney. E. hel´lem causes eye infections in humans. E. intes...

encephalitozoonosis
(en″sә-fal″ĭ-to-zo″o-no´sis) infection with protozoa of the genus Encephalitozoon. It was formerly seen more in other animals than in humans, and the most common infection was with E. cuniculi, but now other species are seen in opportunistic infections of immunocompromised persons. Different speci...

encephalo-ophthalmic dysplasia
Krause syndrome.

encephalocele
(en-sef´ә-lo-sēl″) hernial protrusion of brain substance and meninges through a congenital or traumatic opening of the skull. occipital encephalocele an encephalocele in the occipital region, the most common kind seen in the Western Hemisphere.

encephalocystocele
(en-sef″ә-lo-sis´to-sēl) hydroencephalocele.

encephalography
(en-sef″ә-log´rә-fe) radiography demonstrating the intracranial fluid-containing spaces after the withdrawal of cerebrospinal fluid and introduction of air or other gas; it includes pneumoencephalography and ventriculography.

encephaloid
(en-sef´ә-loid) resembling the brain or brain substance.

encephalolith
(en-sef´ә-lo-lith″) a calculus in the brain.

encephalomalacia
(en-sef″ә-lo-mә-la´shә) softening of the brain.

encephalomeningitis
(en-sef″ә-lo-men″in-ji´tis) meningoencephalitis.

encephalomeningocele
(en-sef″ә-lo-mә-ning´go-sēl) encephalocele.

encephalomeningopathy
(en-sef″ә-lo-men″in-gop´ә-the) meningoencephalopathy.

encephalomere
(en-sef´ә-lo-mēr) one of the segments making up the embryonic brain.

encephalometer
(en-sef″ә-lom´ә-tәr) an instrument used in locating certain of the brain regions.

encephalomyelitis
(en-sef″ә-lo-mi″ә-li´tis) inflammation of the brain and spinal cord.

encephalomyeloneuropathy
(en-sef″ә-lo-mi″ә-lo-ndbobr-rop´ә-the) a disease involving the brain, spinal cord, and nerves.

encephalomyelopathy
(en-sef″ә-lo-mi″әl-op´ә-the) a disease involving the brain and spinal cord.

encephalomyeloradiculitis
(en-sef″ә-lo-mi″ә-lo-rә-dik″u-li´tis) inflammation of the brain, spinal cord, and spinal nerve roots.

encephalomyeloradiculopathy
(en-sef″ә-lo-mi″ә-lo-rә-dik″u-lop´ә-the) a disease involving the brain, spinal cord, and spinal nerve roots.

encephalomyocarditis
(en-sef″ә-lo-mi″o-kahr-di´tis) a viral disease characterized by degenerative and inflammatory changes in skeletal and cardiac muscle and by lesions of the central nervous system resembling those of poliomyelitis.

encephalomyocarditis virus
an enterovirus that causes mild aseptic meningitis and encephalomyocarditis.

encephalon
(en-sef´ә-lon) brain.

encephalopathy
(en-sef″ә-lop´ә-the) any degenerative disease of the brain.

encephalopuncture
(en-sef″ә-lo-pungk´chәr) surgical puncture of the brain.

encephalopyosis
(en-sef″ә-lo-pi-o´sis) suppuration or abscess of the brain.

encephalorrhagia
(en-sef″ә-lo-ra´jә) hemorrhage within or from the brain.

encephalosclerosis
(en-sef″ә-lo-sklә-ro´sis) hardening of the brain.

encephalosis
(en-sef″ә-lo´sis) any organic brain disease.

encephalotomy
(en-sef″ә-lot´ә-me) craniotomy (def. 2). incision of the brain.

enchondroma
(en″kon-dro´mә) pl. enchondromas, enchondro´mata A benign growth of cartilage arising in the metaphysis of a bone. adj., enchondro´matous., adj.

enchondromatosis
(en-kon″dro-mә-to´sis) a condition characterized by hamartomatous proliferation of cartilage cells within the metaphysis of several bones, causing thinning of the overlying cortex and distortion of the growth in length. Called also dyschondroplasia.

enchondrosarcoma
(en-kon″dro-sahr-ko´mә) central chondrosarcoma.

enclave
(en´klāv) (ahn-klahv´) tissue detached from its normal connection and enclosed within another organ.

encopresis
(en-ko-pre´sis) fecal incontinence.

encounter group
a sensitivity group in which the members strive to gain emotional rather than intellectual insight, with emphasis on the expression of interpersonal feelings in the group situation.

encysted
(en-sist´әd) enclosed in a sac, bladder, or cyst.

encysted pleurisy
a form with adhesions that surround the effused material; called also blocked or circumscribed pleurisy.

end artery
one that undergoes progressive branching without development of channels connecting with other arteries, so that if blocked it cannot supply sufficient blood to the tissue depending on it.

end bud
caudal eminence.

end feel
(end´ fēl″) a characteristic sensation perceived by the examiner when the end of joint range of motion is reached. The six types of joint end feel most often used are bone to bone, soft tissue approximation, spasm end feel, empty end feel, capsular end feel, and springy block.

end plate
(end plāt) a flat termination.

end-bulb
(end´bulb) encapsulated nerve ending.

end-diastolic pressure
the pressure in the ventricles of the heart at the end of diastole, usually measured in the left ventricle as an estimation of the preload (end-diastolic volume).

end-diastolic volume
the volume of blood in each ventricle at the end of diastole, usually about 120–130 mL but sometimes reaching 200–250 mL in the normal heart; it is a measure of preload) and is the sum of the stroke volume and the end-systolic volume.

end-foot
(end´foot) a buttonlike or knoblike terminal enlargement on a naked nerve fiber that ends in a synapse with dendrites of another cell. Called also bouton terminal.

end-hole catheter
a cardiac catheter with a hole in the tip, through which a guidewire may be passed or pressure monitored.

end-organ
(end-or´gәn) end organ one of the larger, encapsulated endings of sensory nerves. Written also end organ.

end-position nystagmus
that occurring only at extremes of gaze.

end-stage renal disease
chronic renal failure that is irreversible; at this stage serum creatinine and blood urea nitrogen (BUN) levels continue to rise and there is uremia with impairment of all body systems.

end-systolic volume
the volume of blood remaining in each ventricle at the end of systole, usually about 50–60 mL but sometimes as little as 10–30 mL in the normal heart; it is the difference between the end-diastolic volume and the stroke volume and is determined by the contractility of the ventricles and the state of the venous system.

end-to-end anastomosis
an anastomosis connecting the end of an artery and that of some other vessel, either directly or with a synthetic graft. anastomosis of two sections of colon, such as with partial colectomy or when an ileostomy is closed.

end-to-side anastomosis
an anastomosis connecting the end of one vessel with the side of a larger one. one between two sections of colon with the smaller segment terminating at a stoma in the side of the larger one.

endadelphos
(end″ә-del´fos) a fetus in which a parasitic twin is enclosed within the body of the other twin (the autosite).

endangiitis
(end-an″je-i´tis) inflammation of the tunica intima; called also endoangiitis, endovasculitis, and intimitis.

endaortitis
(end″a-or-ti´tis) inflammation of the tunica intima of the aorta.

endarterectomy
(end-ahr″tәr-ek´tә-me) excision of thickened atheromatous areas of the innermost coat of an artery; see also atherectomy. carotid endarterectomy surgical removal of atherosclerotic plaques within an extracranial carotid artery, usually the common carotid, done to prevent...

endarterial
(end″ahr-tēr´e-әl) intra-arterial.

endarteritis
(end-ahr″tә-ri´tis) inflammation of the tunica intima of an artery; called also endoarteritis. endarteritis obliterans a form in which the lumina of the smaller vessels become narrowed or obliterated as a result of proliferation of the tissue of the intimal layer. See...

endaural
(end-aw´rәl) within the ear.

endbrain
(end´brān) telencephalon.