8 Words That Are Older Than You Think


[lak-tik] /ˈlæk tɪk/
of, pertaining to, or obtained from milk.
1780-90; lact- + -ic
Related forms
nonlactic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples from the web for lactic
  • To do this, it uses a whole-cell biocatalyst system to make lactic acid by fermenting corn sugar.
  • The problem is that lactic acid molecules exist in two forms, left-handed and right-handed, that are mirror images of each other.
  • Nor, again, does the mere presence of lactic acid necessarily imply the presence of lactic ferment.
  • Your muscles become cramped from lactic acid and from the number of hours you're standing upright.
  • Improved circulation speeds up the rate that lactic acid, which builds up during a workout, is forced out of those areas.
  • Carbs break down into lactic acid in your muscles, which becomes lactate in the blood.
  • Sitting in the same position for hours causes lactic acids to build up in the muscles, causing tenseness and aches.
  • After that, the lactic acid in your muscles start to build up in your body so heavy for the next four or five days after that.
  • The tang is the lactic acid that's been formed by the breakdown of the milk sugar, lactose.
  • Country life is devoted, above all else, to converting this lactic bounty into cheese.
British Dictionary definitions for lactic


relating to or derived from milk
Word Origin
C18: from Latin lact-, lac milk
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
Cite This Source
Word Origin and History for lactic

"pertaining to milk," 1790 (in lactic acid; so called because it was obtained from sour milk), from French lactique, from Latin lactis, genitive of lac "milk" (see lactation) + French -ique.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
lactic in Medicine

lactic lac·tic (lāk'tĭk)
Of, relating to, or derived from milk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Word Value for lactic

Scrabble Words With Friends