| photo-engraving | The process of obtaining an etched or engraved plate from the photographic image, to be used in printing; also, a picture produced by such a process. Origin: Photo- + engraving. Source: Websters Dictionary (01 Mar 1998) |
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| electro-engraving | The art or process of engraving by means of electricity. Source: Websters Dictionary (01 Mar 1998) |
| engraving | 1. The act or art of producing upon hard material incised or raised patterns, characters, lines, and the like; especially, the art of producing such lines, etc, in the surface of metal plates or blocks of wood. Engraving is used for the decoration of the surface itself; also, for producing an original, from which a pattern or design may be printed on paper. 2. That which is engraved; an engraved plate. 3. An impression from an engraved plate, block of wood, or other material; a print. Engraving on wood is called xylography; on copper, chalcography; on stone lithography. Engravings or prints take from wood blocks are usually called wood cuts, those from stone, lithographs. Source: Websters Dictionary (01 Mar 1998) |
| 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) |
| Amine Precursor Uptake and Decarboxylation | <pharmacology, physiology> Paracrine cells of which argentaffin cells are an example. Usage of the term APUD is neither helpful nor memorable. Acronym: APUD (11 Nov 1997) |
| amino acids, peptides, and proteins | Amino acids and chains of amino acids connected by peptide linkages. (12 Dec 1998) |
| Anderson and Goldberger test | A test for typhus in which the patient's blood is injected into a guinea pig's peritoneal cavity. In typhus a typical temperature curve will be observed. (05 Mar 2000) |
| anniversaries and special events | Occasions to commemorate an event or occasions designated for a specific purpose. (12 Dec 1998) |