a combining form meaning “same,” used in the formation of compound words: tautomerism.

Origin of tauto-

< Greek, combining form of tautó, contraction of tò autó the same
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British Dictionary definitions for tauto-


before a vowel taut-

combining form

identical or sametautology; tautonym

Word Origin for tauto-

from Greek tauto, from to auto
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for tauto-



Same; identical:tautomeric.
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