The conversion of molecules from one form to another within an organism, often associated with change (increase, decrease, or little change) in pharmacologic activity; refers especially to drugs and other xenobiotics. SYN: biodegradation.
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bio·trans·for·ma·tion 'bī-ō-.tran(t)s-fər-'mā-shən, -fȯr- n the transformation of chemical compounds in a living system
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bio·trans·for·ma·tion (bi″o-trans″for-maґshən) the series of chemical alterations of a compound (e.g., a drug) that take place within the body, such as by enzymatic activity.Medical dictionary. 2011.