| Del Castillo | E.B., 20th century Argentinian physician. See: Del Castillo syndrome, Argonz-Del Castillo syndrome, Ahumada-Del Castillo syndrome. (05 Mar 2000) |
|---|---|
| Del Castillo syndrome | <syndrome> The absence from the seminiferous tubules of the testes of germinal epithelium, Sertoli cells alone being present; there is sterility due to azoospermia but no other sexual abnormality, Leydig cells are normal, and the output of gonadotrophins in the urine is increased; probably represents one form of seminiferous tubule dysgenesis. Synonym: Del Castillo syndrome. (05 Mar 2000) |
| Delafield | Francis, U.S. Physician and pathologist, 1841-1915. See: Delafield's haematoxylin. (05 Mar 2000) |
| Delafield's haematoxylin | An alum type of haematoxylin used in histology; natural ripening takes about 2 months and the solution is good for years. (05 Mar 2000) |
| delamination | <biology> Formation and separation of laminae or layers; one of the methods by which the various blastodermic layers of the ovum are differentiated. This process consists of a concentric splitting of the cells of the blastosphere into an outer layer (epiblast) and an inner layer (hypoblast). By the perforation of the resultant two-walled vesicle, a gastrula results similar to that formed by the process of invagination. Source: Websters Dictionary (01 Mar 1998) |
| Delaney clause | A clause of the Food Additive Amendment of the U.S. Federal law specifying that no substance that has been found to induce cancer in any animal may be incorporated into food. Origin: James F. Delaney, U.S. Congressman (05 Mar 2000) |
| delavirdine | A member of a class of compounds, including delavirdine, loviride and nevirapine, that acts to directly combine with and block the action of HIV's reverse transcriptase (see). In contrast, nucleoside analogs block reverse transcriptase by capping the unfinished DNA chain that the enzyme is constructing. NNRTIs have suffered from HIV's ability to rapidly mutate and become resistant to their effects. (09 Oct 1997) |
| delaware | <botany> An American grape, with compact bunches of small, amber-coloured berries, sweet and of a good flavor. Source: Websters Dictionary (01 Mar 1998) |
| delay, developmental | Behind schedule in reaching milestones of early childhood development. (12 Dec 1998) |
| delayed allergy | A type IV allergic reaction; so called because in a sensitised subject the reaction becomes evident hours after contact with the allergen (antigen), reaches its peak after 36 to 48 hours, then recedes slowly. Associated with cell-mediated responses. See: delayed reaction. Compare: immediate allergy. (05 Mar 2000) |
| delayed coma after hypoxia | Coma that develops a few days to 3 weeks after an acute hypoxic insult; the latter was usually severe enough to cause an initial bout of coma, which cleared, and was followed by a transient interval of apparent normality. Synonym: severe postanoxic encephalopathy. (05 Mar 2000) |
| delayed conduction | First-degree A-V block. See: atrioventricular block, intraventricular block, bundle-branch block. (05 Mar 2000) |
| delayed dentition | Delayed eruption of the teeth. (05 Mar 2000) |
| delayed eruption | A dental eruption pattern which is chronologically late in comparison with the average pattern of dental eruption; eruption of the first tooth occurs at a later age than the average, and the intervals of time between subsequent dental eruption's are longer than the average. Drug eruption, any eruption caused by the ingestion, injection, or inhalation of a drug, most often the result of allergic sensitization; reactions to drugs applied to the cutaneous surface are not generally designated as drug eruption, but as contact-type dermatitis. Synonym: dermatitis medicamentosa, dermatosis medicamentosa, drug rash, medicinal eruption. (05 Mar 2000) |
| delayed flap | A flap raised in its donor area in two or more stages to increase its chances of survival after transfer. (05 Mar 2000) |
| Ahumada-Del Castillo syndrome | <syndrome> Unphysiological lactation and amenorrhoea not following pregnancy characterised by hyperprolactinaemia and a pituitary adenoma. Synonym: Argonz-Del Castillo syndrome. (05 Mar 2000) |
|---|---|
| Argonz-Del Castillo syndrome | <syndrome> Unphysiological lactation and amenorrhoea not following pregnancy characterised by hyperprolactinaemia and a pituitary adenoma. Synonym: Argonz-Del Castillo syndrome. (05 Mar 2000) |
| Hortega, Pio del Rio | <person> Spanish neurohistologist in South America, 1882-1945. See: Hortega cells, Hortega's neuroglia stain. (05 Mar 2000) |