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 volatile substances.
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. 4. probability.
No:512 - diuresis: (Gr. diourein to urinate, to pass in urine) increased excretion of urine.
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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