English dictionary of medical terms (27)
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- No:520 - dorsal
(L. dorsalis; from dorsum back) 1. pertaining to the back or to any
dorsum. 2. denoting a position more toward the back surface than
some other object of reference; same as posterior in human anatomy;
superior in the anatomy of quadrupeds.
- No:521 - dosage
the determination and regulation of the size, frequency, and number
- No:522 - dosage schedule
a scheme set up to determine and regulate size, frequency and
number of doses.
- No:523 - dose
(Gr. dosis a giving) a quantity to be administered at one time,
such as a specified amount of medication.
- No:524 - double-blind
pertaining to a clinical trial or other experiment in which neither
the subject nor the person administering treatment knows which
treatment any particular subject is receiving.
- No:525 - douching
a jet or current of water, sometimes a dissolved medicating or
cleansing agent, applied to a body part, organ or cavity for
medicinal or hygienic purposes.
- No:526 - drainage
the systematic withdrawal of fluids and discharges from a wound,
sore or cavity.
- No:527 - duct
(L. ductus from ducere to draw or lead) a passage with well-defined
walls, especially a tube for the passage of excretions or
secretions; called also ductus (NA).
- No:528 - duodenum
(L. duodeni twelve at a time) (NA) the first or proximal portion of
the small intestine, extending from the pylorus to the jejunum; so
called because it is about 12 fingerbreadths in length.
- No:529 - dura mater
(L. 'hard mother') the outermost, toughest, and most fibrous of the
three membranes (meninges) covering the brain and spinal cord;
called also pachymeninx.
- No:530 - dysarthria
(dys- + Gr. arthroun to utter distinctly + -ia) imperfect
articulation of speech due to disturbances of muscular control
which result from damage to the central or peripheral nervous
- No:531 - dyscrasia
(Gr. dyskrasia bad temperament) a term formerly used to indicate an
abnormal mixture of the four humours; in surviving usages it now is
roughly synonymous with 'disease' or 'pathologic condition'.
- No:532 - dysentery
(L. dysenteria, from Gr. dys- + enteron intestine) any of various
disorders marked by inflammation of the intestines, especially of
the colon, and attended by pain in the abdomen, tenesmus, and
frequent stools containing blood and mucus. Causes include
chemical irritants, bacteria, protozoa, or parasitic worms.
- No:533 - dysfunction
disturbance, impairment, or abnormality of the functioning of an
- No:534 - dysgenesis
- No:535 -dysgeusia
(dys- + Gr. geusis taste) distortion of the sense of taste.
- No:536 - dyskinesia
(Gr. dyskinsia difficulty of moving) impairment of the power of
voluntary movement, resulting in fragmentary or incomplete
- No:537 - dysmenorrhoea
(dys- + Gr. mn month + rhein to flow) painful menstruation.
- No:538 - dyspareunia
(Gr. dyspareunos badly mated) difficult or painful coitus.
- No:539 - dyspepsia
(dys- + Gr. peptein to digest) impairment of the power of function
of digestion; usually applied to epigastric discomfort following
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