| dummy | An artificial tooth on a fixed partial denture; it replaces the lost natural tooth, restores its functions, and usually occupies the space previously occupied by the natural crown. Synonym: dummy. (05 Mar 2000) |
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| dummy consultand | A person in the line of descent from the leading ancestor to the consultand proper; for logical simplicity, the dummy consultand is analyzed as if the consultand proper. (05 Mar 2000) |
| carbon source | Any carbon-containing organic molecule (carbohydrate, aminoacid) that an organism can use to produce energy in the form of ATP. (09 Oct 1997) |
| major source | A source that emits, or has the potential to emit, a pollutant regulated under the Clean Air act in excess of a specified rate in a nonattainment area. (05 Dec 1998) |
| common-source epidemic | <microbiology> An epidemic resulting from infection of a large number of people from a single contaminated source. (09 Oct 1997) |
| point source | In photometry, a very small source of light which is regarded as a geometrical point from which light emanates in straight lines in all directions. (05 Mar 2000) |
| power source | Devices that supply energy. (12 Dec 1998) |
| source emission reduction plan | (SERP) A contingency plan developed to reduce emissions during an air quality emergency. (05 Dec 1998) |