| dilation and evacuation | Dilation of the cervix and removal of the products of conception. Acronym: D&E (05 Mar 2000) |
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| dilation and curettage | Dilation of the cervix and curettement of the endometrium. Acronym: D&C (05 Mar 2000) |
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| evacuation | An emptying, as of the bowels. Origin: L. Evacuatio = to empty (11 Nov 1997) |
| post-stenotic dilation | Dilation of an artery, most commonly the pulmonary artery or the aorta, distal to an area of narrowing. (05 Mar 2000) |
| pupillary dilation | <ophthalmology> The action of stretching or enlarging the pupil for example by atropine. (18 Nov 1997) |
| dilation | The process of enlargment or expansion. The word dilatation means the same thing. Both come from the Latin dilatare meaning to enlarge or expand. (12 Dec 1998) |
| dilation thrombosis | Thrombosis due to slowed circulation consequent upon dilation of a vein. (05 Mar 2000) |
| urethral dilation | Increasing the caliber of the urethra by passage of a dilator. (05 Mar 2000) |
| abstracting and indexing | Shortening or summarizing of documents; assigning of descriptors for referencing documents. (12 Dec 1998) |
| academies and institutes | Organizations representing specialised fields which are accepted as authoritative; may be non-governmental, university or an independent research organization, e.g., national academy of sciences, brookings institution, etc. (12 Dec 1998) |
| accounts payable and receivable | Short-term debt obligations and assets occurring in the regular course of operational transactions. (12 Dec 1998) |
| aged, 80 and over | A person 80 years of age and older. (12 Dec 1998) |
| algae and fungi | Algae represent a group of spore-propagating plants, unicellular or undifferentiated into root, stem, and leaf. They include seaweed and many unicellular fresh water plants, most of which contain chlorophyll. They account for about 90% of the earth's photosynthetic activity. Fungi are eukaryotic, heterotrophic organisms that live as saprobes or parasites and include mushrooms, yeasts, smuts, molds, etc. They lack chlorophyll. (12 Dec 1998) |
| alkyl and aryl transferases | <enzyme> A somewhat heterogeneous class of enzymes that catalyze the transfer of alkyl or related groups (excluding methyl groups). Registry number: EC 2.5 (12 Dec 1998) |
| allergy and immunology | A medical specialty concerned with the hypersensitivity of the individual to foreign substances and protection from the resultant infection or disorder. (12 Dec 1998) |
| alligators and crocodiles | Large, long-tailed reptiles, including caimans, of the order loricata. (12 Dec 1998) |