| aponeurosis of origin | A tendinous expansion serving as the attachment of origin of a broad muscle. (05 Mar 2000) |
|---|---|
| replication origin | A unique DNA sequence of a replicon at which DNA replication is initiated and proceeds bidirectionally or unidirectionally. It contains the sites where the first separation of the complementary strands occurs, a primer RNA is synthesised, and the switch from primer RNA to DNA synthesis takes place. (rieger et al., glossary of genetics: classical and molecular, 5th ed) (12 Dec 1998) |
| centers of origin | <agriculture> Usually the location in the world where the oldest cultivation of a particular crop has been identified. (09 Oct 1997) |
| nuclei of origin | Collections of motor neurons (forming a continuous column in the spinal cord, discontinuous in the medulla and pons) giving origin to the spinal and cranial motor nerves. Synonym: nuclei originis, motor nuclei. (05 Mar 2000) |
| duck embryo origin vaccine | See: rabies vaccine. (05 Mar 2000) |
| origin | 1. The first existence or beginning of anything; the birth. "This mixed system of opinion and sentiment had its origin in the ancient chivalry." (Burke) 2. That from which anything primarily proceeds; the fountain; the spring; the cause; the occasion. 3. <anatomy> The point of attachment or end of a muscle which is fixed during contraction; in contradistinction to insertion. <mathematics> Origin of coordinate axes, the point where the axes intersect. See Note under Ordinate. Synonym: Commencement, rise, source, spring, fountain, derivation, cause, root, foundation. Origin, Source. Origin denotes the rise or commencement of a thing; source presents itself under the image of a fountain flowing forth in a continuous stream of influences. The origin of moral evil has been much disputed, but no one can doubt that it is the source of most of the calamities of our race. "I think he would have set out just as he did, with the origin of ideas the proper starting point of a grammarian, who is to treat of their signs." (Tooke) "Famous Greece, That source of art and cultivated thought Which they to Rome, and Romans hither, brought." (Waller) Origin: F. Origine, L. Origo, -iginis, fr. Oriri to rise, become visible; akin to Gr. To stir up, rouse, Skr. R, and perh. To E. Run. Source: Websters Dictionary (01 Mar 1998) |
| origin of replication | <molecular biology> Regions of DNA that are necessary for its replication to begin, such as pBR322 ori, required for plasmid replication. (18 Nov 1997) |
| ectal origin | Superficial origin, or apparent origin, the point where the nerve emerges from the brain. Origin: L. Origo, source, beginning, fr. Orior, to rise (05 Mar 2000) |
| ental origin | Deep origin, or real origin, the cell group in the brain or medulla, whence the fibres of the nerve begin, and the (05 Mar 2000) |
| fever of unknown origin | Fever in which the aetiology cannot be ascertained. (12 Dec 1998) |
| air pollutants, environmental | Air pollutants which affect environmental conditions. (12 Dec 1998) |
| carcinogens, environmental | Carcinogenic substances that are found in the environment. (12 Dec 1998) |
| national environmental policy act | A federal law enacted in 1969 that requires all federal agencies to consider and analyse the environmental impacts of any proposed action. NEPA requires an environmental impact statement for major federal actions significantly affecting the quality of the environment. NEPA requires federal agencies to inform and involve the public in the agency's decision making process and to consider the environmental impacts of the agency's decision. (05 Dec 1998) |
| draft environmental impact statement | (DEIS) A draft statement of environmental effects. Section 102 of the National Environmental Policy Act requires a DEIS for all major federal actions. The DEIS is released to the public and other agencies for comment and review. (05 Dec 1998) |
| environmental assessment | (EA) A public document that analyzes a proposed federal action for the possibility of significant environmental impacts. The analysis is required by NEPA. If the environmental impacts will be significant, the federal agency must then prepare an environmental impact statement. (05 Dec 1998) |