English dictionary of medical terms (25)
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- No:480 - detergent
(L. detergere to cleanse) an agent which purifies or cleanses.
- No:481 - detoxification
treatment designed to free an addict from his drug habit.
- No:482 - diabetes
(Gr. diabts a syphon, from dia through + bainein to go) a general
term referring to disorders characterized by excessive urine
excretion (polyuria), as in diabetes mellitus and diabetes
insipidus. When used alone, the term refers to diabetes mellitus.
- No:483 - diagnosis
(dia- + Gr. gnosis knowledge) the determination of the nature of a
case of disease.
- No:484 - dialysis
(dia- + Gr. lysis dissolution) the process of separating
crystalloids and colloids in solution by the difference in their
rates of diffusion through a semipermeable membrane; crystalloids
pass through readily, colloids very slowly or not at all. See also
- No:485 - diameter
the length of a straight line passing through the centre of a
circle and connecting opposite points on its circumference; hence
the distance between two specified opposite points on the periphery
of a structure such as the cranium or pelvis.
- No:486 - diaphoresis
(Gr. diaphorsis) perspiration, especially profuse perspiration.
Called also sudoresis.
- No:487 - diarrhoea
(dia- + Gr. rhein to flow) abnormal frequency and liquidity of
- No:488 - diastolic
of or pertaining to the diastole.
- No:489 - diathermy
(dia- + Gr. therm heat) heating of the body tissues due to their
resistance to the passage of high-frequency electromagnetic
radiation, electric currents, or ultrasonic waves. In medical d.
(thermopenetration) the tissues are warmed but not damaged; in
surgical d. (electrocoagulation) tissue is destroyed.
- No:490 - diathesis
(Gr. 'arrangement, disposition') a constitution or condition of the
body which makes the tissues react in special ways to certain
extrinsic stimuli and thus tends to make the person more than
usually susceptible to certain diseases.
- No:491 - differentiation
the distinguishing of one thing or disease from another.
- No:492 - diffuse
(L. dis- apart + fundere to pour) not definitely limited or
localized; widely distributed.
- No:493 - diffusion
the process of becoming diffused, or widely spread; the spontaneous
movement of molecules or other particles in solution, owing to
their random thermal motion, to reach a uniform concentration
throughout the solvent, a process requiring no addition of energy
to the system.
- No:494 - digestive
pertaining to digestion.
- No:495 - digitalization
the administration of digitalis in a dosage schedule designed to
produce and then maintain optimal therapeutic concentrations of its
- No:496 - dilatation
the condition, as of an orifice or tubular structure, of being
dilated or stretched beyond the normal dimensions.
- No:497 - diphtheria
(Gr. diphthera leather + -ia) an acute infectious disease caused by
toxigenic strains of Corynebacterium diphtheriae, acquired by
contact with an infected person or a carrier of the disease, which
is usually confined to the upper respiratory tract, and
characterized by the formation of a tough membrane (false membrane
or pseudomembrane) attached firmly to the underlying tissue that
will bleed if forcibly removed. In the most serious infections the
membrane begins in the tonsillar (faucial) area on one tonsil and
may spread to involve the other tonsil, uvula, soft palate, and
pharyngeal wall, from where it may extend to the larynx, trachea,
and bronchial tree, and may cause bronchial obstruction and death
by hypoxia. Diphtheria also occurs in a cutaneous form and may
rarely involve the eyes, middle ear, buccal mucosa, genitalia and
umbilical stump, usually secondarily. Systemic effects, chiefly
myocarditis and peripheral neuritis, are caused by the exotoxin
produced by C. diphtheriae. Called also Bretonneau's angina or
- No:498 - diplopia
(diplo- + -opia) the perception of two images of a single object;
called also ambiopia, double vision, and binocular polyopia.
- No:499 - direct
(L. directus) 1. straight; in a straight line. 2. performed
immediately and without the intervention of subsidiary means.
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