9 Grammatical Pitfalls


[lak-tey-shuh n] /lækˈteɪ ʃən/
the secretion or formation of milk.
the period of milk production.
Origin of lactation
1660-70; < Late Latin lactātiōn- (stem of lactātiō) a giving suck. See lactate1, -ion
Related forms
lactational, adjective
lactationally, adverb
hyperlactation, noun
overlactation, noun
superlactation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lactation
  • It may be that females need to control the limited supply to meet the nutritional demands of pregnancy and lactation.
  • They supply the mamma, and increase considerably in size during the period of lactation.
  • Use of psychiatric medications during pregnancy and lactation.
  • Among traditional hunter-gatherers the average family size was small due to prolonged lactation and frequent infanticide.
  • The criticism came swiftly: lactation consultants warned that she would never be able to express enough milk.
British Dictionary definitions for lactation


the secretion of milk from the mammary glands after parturition
the period during which milk is secreted
Derived Forms
lactational, adjective
lactationally, adverb
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
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Word Origin and History for lactation

1660s, "process of suckling an infant," from French lactation, from Late Latin lactationem (nominative lactatio) "a suckling," noun of action from past participle stem of lactare "suckle," from lac (genitive lactis) "milk," from PIE root *glakt- (cf. Greek gala, genitive galaktos, "milk"), which, along with *melg-, accounts for words for "milk" in most Indo-European languages (the absence of a common word for it is considered a mystery). Meaning "process of secreting milk from the breasts" first recorded 1857. Middle Irish lacht, Welsh llaeth "milk" are loan words from Latin.

Online Etymology Dictionary, © 2010 Douglas Harper
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lactation in Medicine

lactation lac·ta·tion (lāk-tā'shən)

  1. The secretion or formation of milk by the mammary glands.

  2. The period during which the mammary glands secrete milk.

lac·ta'tion·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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lactation in Science
The secretion or production of milk by the mammary glands in female mammals after giving birth.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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