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Definition of: lysergic acid
(lī·sûr′jik) noun Biochem.
A crystalline alkaloid, C16H16N2O2, derived from ergot, of which it is the chief toxic principle, and forming the base of lysergic acid di·eth·yl·am·ide–25 (dī′eth·əl·am′īd), or LSD. [<LYS- + erg (ot) + -IC]
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