English dictionary of medical terms (26)
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- No:500 - discoid
(Gr. diskos disk + -oid) shaped like a disk.
- No:501 - disinfectant
an agent that disinfects; applied particularly to agents used on
inanimate objects. Cf. antiseptic.
- No:502 - dislocation
(dis- + L. locare to place) the displacement of any part, more
especially of a bone. Called also luxation.
- No:503 - disorientation
the loss of proper bearings, or a state of mental confusion as to
time, place, or identity.
- No:504 - disposition
a tendency either physical or mental toward certain diseases.
- No:505 - disseminate
to scatter or distribute over a considerable area.
- No:506 - dissociation
(L. dis- neg. + sociatio union) 1. the act of separating or state
of being separated. 2. the separation of a molecule into two or
more fragments (atoms, molecules, ions, or free radicals) produced
by the absorption of light or thermal energy or by solvation. 3.
in psychology, a defense mechanism in which a group of mental
processes are segregated from the rest of a person's mental
activity in order to avoid emotional distress, as in the
dissociative disorders (q.v.), or in which an idea or object is
segregated from its emotional significance; in the first sense it
is roughly equivalent to splitting, in the second, to isolation.
4. a defect of mental integration in which one or more groups of
mental processes become separated off from normal consciousness
and, thus separated, function as a unitary whole.
- No:507 - distal
(L. distans distant) remote; farther from any point of reference;
opposed to proximal. In dentistry, used to designate a position on
the dental arch farther from the median line of the jaw.
- No:508 - distention
the state of being distended or enlarged; the act of distending.
- No:509 - distil
(L. destillare; de from + stillare to drop) to volatilize by heat
and then cool and condense the evaporated matter, as to purify a
substance or to separate a volatile substance from other less
- No:510 - distortion
(L. dis- apart + torsio a twisting) the state of being twisted out
of a natural or normal shape or position.
- No:511 - distribution
(L. distributio) 1. the specific location or arrangement of
continuing or successive objects or events in space or time. 2.
the extent of a ramifying structure such as an artery or nerve and
its branches. 3. the geographical range of an organism or disease.
- No:512 - diuresis
(Gr. diourein to urinate, to pass in urine) increased excretion of
- No:513 - diuretic
(Gr. diourtikos promoting urine) an agent that promotes the
excretion of urine.
- No:514 - diurnal
occurring during the day.
- No:515 - diverticulitis
inflammation of a diverticulum, especially inflammation related to
colonic diverticula, which may undergo perforation with abscess
formation. Sometimes called left-sided or L-sides appendicitis.
- No:516 - document
(L. docere to teach) an original or official paper relied upon as
the basis, proof or support of something; a writing (as a book,
report or letter) conveying information; a publication of federal,
state, or local government - chiefly in library usage.
- No:517 - dominance
(L. dominari to govern) in genetics, the full phenotypic expression
of a gene in both heterozygotes and homozygotes.
- No:518 - donor
an individual organism that supplies living tissue to be used in
another body, as a person who furnished blood for transfusion, or
an organ for transplantation in a histocompatible recipient.
- No:519 - doping
(Dutch doop, sauce) the action of administering a drug to someone
before a sports event (originally to a horse before a race); the
substance thus administered.
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