| meconin | <chemistry> A substance regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance. Also erroneously called meconina, meconia, etc, as though it were an alkaloid. Origin: Cf. F. Meconine. Source: Websters Dictionary (01 Mar 1998) |
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| meconinic | <chemistry> Pertaining to, or designating, an acid which occurs in opium, and which may be obtained by oxidizing narcotine. Source: Websters Dictionary (01 Mar 1998) |