lacto-

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a combining form meaning “milk,” used in the formation of compound words (lactometer); specialized in chemical terminology to mean “lactate,” or “lactic acid.”

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Also lacti-; especially before a vowel, lact-.

Origin of lacto-

<Latin lact- (stem of lac milk) + -o-

Words nearby lacto-

lactifuge, lactigenous, lactigerous, lactim, lactivist, lacto-, lactobacillus, lactocele, lactoferrin, lactoflavin, lactogen

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use lacto- in a sentence

The lacto-phosphate may be given in combination with cod-liver oil.
A System of Practical Medicine By American Authors, Vol. II|Various
Finally, add the rest of the solution of the lacto-phosphate of lime, and mix thoroughly.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
I am very92 sure the farmer who chooses this lacto-vegetarian diet will thrive on it.
How to Eat|Thomas Clark Hinkle
But rendered freely, it reads: morishille's voozy, with lacto-ecto added for a new taste sensation.
One Man's Poison|Robert Sheckley

In Walther's lacto-fermentator samples of milk are simply allowed to stand in bottles or glass jars until they sour.
Outlines of Dairy Bacteriology, 8th edition|H. L. Russell

British Dictionary definitions for lacto-

lacto-

before a vowel lact-

combining form

indicating milklactobacillus

Word Origin for lacto-

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

Medical definitions for lacto-

lacto-

pref.

Milk:lactoglobulin.

Lactose:lactase.

Lactic acid:lactate.