| pyrpurin | <chemistry> A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance. Source: Websters Dictionary (01 Mar 1998) |
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| pyrpuriparous | <biology> Producing, or connected with, a purple-coloured secretion; as, the purpuriparous gland of certain gastropods. Origin: L. Purpura purple + parere to produce. Source: Websters Dictionary (01 Mar 1998) |