| Downs' analysis | <dentistry> A series of cephalometric criteria used as an aid in orthodontic diagnosis. (05 Mar 2000) |
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| Downs, William | <person> U.S. Orthodontist, 1899-1966. See: Downs' analysis. (05 Mar 2000) |
| downstream | 1. <molecular biology> Portions of DNA or RNA that are more remote from the initiation sites and that will therefore be translated or transcribed later. 2. Shorthand term for things that happen at a late stage in a sequence of reactions. (18 Nov 1997) |
| downstream processing | The various stages of processing that occur after the completion of the fermentation or bioconversion stage, including separation, purification, and packaging of the product. (14 Nov 1997) |