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[luh-noo-goh, -nyoo-] /ləˈnu goʊ, -ˈnyu-/
noun, plural lanugos. Biology
a coat of delicate, downy hairs, especially that with which the human fetus or a newborn infant is covered.
1670-80; < Latin lānūgō wooliness, down, derivative of lāna wool Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lanugo
  • Ribbon seals are born with a natal coat of soft, white hair called lanugo, which provides insulation in air.
  • Ribbon seal pups are born with a wooly white lanugo coat that is molted after four to five weeks.
  • Pups are born covered in lanugo, a white wooly hair that insulates them until they can build fat reserves.
  • lanugo are fine hairs found on newborns, lost shortly after birth.
British Dictionary definitions for lanugo


noun (pl) -gos
a layer of fine hairs, esp the covering of the human fetus before birth
Derived Forms
lanuginous (ləˈnjuːdʒɪnəs), lanuginose, adjective
lanuginousness, noun
Word Origin
C17: from Latin: down, from lāna wool
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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lanugo in Medicine

lanugo la·nu·go (lə-nōō'gō, -nyōō'-)
n. pl. la·nu·gos
The fine, soft hair that grows on a fetus and is present on a newborn. Also called lanugo hair.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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lanugo in Science
A covering of fine, soft hair or hairlike structures, as on a leaf, insect, or human fetus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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