• synonyms


[tawr-ahyn, -in]
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  1. of, relating to, or resembling a bull.
  2. pertaining to the zodiacal sign Taurus.

Origin of taurine1

From the Latin word taurīnus, dating back to 1605–15. See taur-, -ine1


[tawr-een, -in]
noun Chemistry.
  1. a neutral crystalline substance, C2H7NO3S, obtained from bile.

Origin of taurine2

First recorded in 1835–45; taur(ocholic) + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for taurine


  1. of, relating to, or resembling a bull

Word Origin

C17: from Latin taurīnus, from taurus a bull


  1. a derivative of the amino acid, cysteine, obtained from the bile of animals; 2-aminoethanesulphonic acid. Formula: NH 2 CH 2 CH 2 SO 3 H

Word Origin

C19: from tauro- (as in taurocholic acid, so called because discovered in ox bile) + -ine ²
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

Word Origin and History for taurine


chemical substance (aminoethyl-sulphonic acid), 1845, from Latin taurus "bull" (see steer (n.)) + chemical suffix -ine (2); obtained by German professor Leopold Gmelin in 1826 and so called because it was first found in ox bile.

Online Etymology Dictionary, © 2010 Douglas Harper

taurine in Medicine


  1. A colorless crystalline substance formed by the hydrolysis of taurocholic acid and found in the fluids of the muscles and lungs of many animals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.