| purified w. |
[USP] water obtained by distillation or deionization, used for pharmaceutical or other purposes requiring mineral-free water. Not for parenteral administration.
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| puriform |
pyoid.
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| purine |
a colorless crystalline heterocyclic compound, C5H4N4, which is not found free in nature, but is variously substituted to produce a group of compounds known as purines or purine bases (see illustration at base), of which uric acid is a metabolic end product. The purine bases include adenine and guanine, which are constituents of nucleic acids, and hypoxanthine and xanthine.
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| purine a. |
a structural analogue of one of the purine bases (e.g., adenine, guanine), able to inhibit the biosynthesis of purine bases or to mimic them such that the analogues interfere with the synthesis or function of nucleic acids. Their clinical uses include antineoplastic, immunosuppressive, and antiviral agents.
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| purine b.’s |
a group of chemical compounds of which purine is the base, including 6-oxypurine (hypoxanthine); 2,6-dioxypurine (xanthine); 6-aminopurine (adenine); 2-amino-6-oxypurine (guanine); 2,6,8-trioxypurine (uric acid); and 3,7-dimethyl xanthine (theobromine). Called also xanthine b's. See illustration. Click here to view image■Purine and pyrimidine bases. (A), Purine and some substituted purine bases occurring in nucleic acids; (B), pyrimidine and some substituted pyrimidine bases occurring in nucleic acids.
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| PUR | a long-acting barbiturate used as a sedative |
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| PUR | a US military decoration awarded to any member of the armed forces who is wounded in action |
| PUR | semi-prostrate evergreen herb of western United States |
| PUR | tufted locoweed of southwestern United States having purple or pink to white flowers |
| PUR | tufted locoweed of southwestern United States having purple or pink to white flowers |
| PUR | marsh herb with a long spike of purple flowers |
| PUR | large North American martin of which the male is blue-black |
| PUR | perennial of southern and western Europe having dense racemes of purple or violet flowers |
| PUR | Eurasian mullein with showy purple or pink flowers |
| PUR | weedy nightshade with silvery foliage and violet or blue or white flowers |
| PUR | flat mild onion having purplish tunics |
| PUR | North American orchid having a spike of violet-purple flowers mixed with white |