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[in-fuh n-see] /ˈɪn fən si/
noun, plural infancies.
the state or period of being an infant; very early childhood, usually the period before being able to walk; babyhood.
the corresponding period in the existence of anything; very early stage:
Space science is in its infancy.
infants collectively.
Law. the period of life to the age of majority, 21 years at common law but now usually 18; minority; nonage.
Origin of infancy
From the Latin word infantia, dating back to 1485-95. See infant, -cy Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for infancy
Contemporary Examples
Historical Examples
  • What then have you done with the sums given you from infancy to squander?

    Clarissa, Volume 1 (of 9) Samuel Richardson
  • I never, for my part, loved any creature, as I loved you from your infancy till now.

    Clarissa, Volume 2 (of 9) Samuel Richardson
  • The infancy of youth, the youth of manhood, the entire past of age.

    The Devil's Dictionary Ambrose Bierce
  • He showed me their power and made me feel it was still but in its infancy.

    The Harbor Ernest Poole
  • Their use was in its infancy, and their character was primitive.

British Dictionary definitions for infancy


noun (pl) -cies
the state or period of being an infant; childhood
an early stage of growth or development
infants collectively
the period of life prior to attaining legal majority (reached at 21 under common law, at 18 by statute); minority nonage
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 infancy

late 14c., from Anglo-French enfaunce and directly from Latin infantia "early childhood," literally "inability to speak," from infantem (see infant).

Online Etymology Dictionary, © 2010 Douglas Harper
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infancy in Medicine

infancy in·fan·cy (ĭn'fən-sē)

  1. The earliest period of childhood, especially before the ability to walk has been acquired.

  2. The state of being an infant.

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