| picronigrosin stain | <technique> A solution of nigrosin in picric acid, used for staining connective tissue. (05 Mar 2000) |
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| picrotoxin | <chemistry> A bitter white crystalline substance found in the cocculus indicus. It is a peculiar poisonous neurotic and intoxicant, and consists of a mixture of several neutral substances. Origin: Gr. Bitter + toxic + -in. Source: Websters Dictionary (01 Mar 1998) |
| picrotoxinin | C15H16O6;a lactone breakdown product of picrotoxin; pharmacological properties resemble those of picrotoxin. (05 Mar 2000) |
| picryl | <chemistry> The hypothetical radical of picric acid, analogous to phenyl. Origin: Picric + -yl. Source: Websters Dictionary (01 Mar 1998) |
| picryl chloride | <chemical> 2-chloro-1,3,5-trinitrobenzene. A hapten that generates suppressor cells capable of down-regulating the efferent phase of trinitrophenol-specific contact hypersensitivity. (arthritis rheum 1991 feb;34(2):180). Chemical name: Benzene, 2-chloro-1,3,5-trinitro- (12 Dec 1998) |