| DAS | dead air space; Death Anxiety Scale; delayed anovulatory syndrome; dextroamphetamine sulfate; digita... |
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| DAT | delayed-action tablet; dementia Alzheimer's type; dental aptitude test; diacetylthiamine; diet as to... |
| DCH | delayed cutaneous hypersensitivity; Diploma in Child Health |
| DCN | data collection network; deep cerebral nucleus; delayed conditioned necrosis; depressed, cognitively... |
| DED | date of expected delivery; defined exposure dose; delayed erythema dose |
| delayed reaction experiment | A method of measuring memory: a stimulus is presented and removed before the organism is permitted to respond to it; the interval during which the stimulus is absent, providing the organism responds correctly, is an indication of the length of memory. (05 Mar 2000) |
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| delayed rectifier channel | <physiology> The potassium selective ion channels of axons, so called because they change the potassium conductance with a delay after a voltage step. The name is used to denote any axon like K channel. Various roles for example regulation of pacemaker potentials, generation of bursts of action potentials or generation of long plateaus on action potentials. (18 Nov 1997) |
| delayed reflex | A reflex in which a little time elapses between stimulus and response. See: trace conditioned reflex. (05 Mar 2000) |
| delayed sensation | A sensation that is not perceived until the lapse of an appreciable interval following the application of the stimulus. General sensation, a sensation referred to the body as a whole rather than to any particular part. (05 Mar 2000) |
| delayed suture | A suturing of a wound after an interval of days. (05 Mar 2000) |
| delayed type hypersensitivity | <immunology> Hypersensitivity (increased reaction by the body to a foreign substance such as an antigen or allergen) that does not appear until 24 to 48 hours after the body is exposed to the foreign substance. (09 Oct 1997) |
| ovum implantation, delayed | Delay of embryonal development whereby the blastocyst remains in the uterine cavity for a variable period of time before attaching to the endometrium and continuing its development. (12 Dec 1998) |
| accessory symptom | A symptom that usually but not always accompanies a certain disease, as distinguished from a pathognomonic symptom. Synonym: assident symptom, concomitant symptom. (05 Mar 2000) |
| accidental symptom | Any morbid phenomenon coincidentally occurring in the course of a disease, but having no relation with it. (05 Mar 2000) |
| assident symptom | A symptom that usually but not always accompanies a certain disease, as distinguished from a pathognomonic symptom. Synonym: assident symptom, concomitant symptom. (05 Mar 2000) |
| Baumes symptom | Pain behind the sternum in angina pectoris. (05 Mar 2000) |
| Bezold's symptom | Inflammatory oedema at the tip of the mastoid process in mastoiditis. Synonym: Bezold's sign. (05 Mar 2000) |
| Bolognini's symptom | A feeling of crepitation on gradually increasing pressure on the abdomen in cases of measles. Cardinal symptom, the primary or major symptom of diagnostic importance. (05 Mar 2000) |
| Macewen's symptom | <clinical sign> Percussion of the skull gives a cracked-pot sound in cases of hydrocephalus. Synonym: Macewen's symptom. (05 Mar 2000) |
| rainbow symptom | A yellowish white ring surrounding the optic disk, indicating atrophy of the choroid in glaucoma. Synonym: glaucomatous ring. A halo surrounding lights, caused by corneal oedema in glaucoma. Synonym: rainbow symptom. (05 Mar 2000) |