tauto-

American

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

tautomerism.

tauto- British

combining form

identical or same

tautology
tautonym

"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

Etymology

Origin of tauto-

< Greek, combining form of tautó, contraction of tò autó the same

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023