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lanugo

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la⋅nu⋅go

[luh-noo-goh, -nyoo-]
–noun, plural -gos. Biology.
a coat of delicate, downy hairs, esp. that with which the human fetus or a newborn infant is covered.

Origin:
1670–80; < L lānūgō wooliness, down, deriv. of lāna wool
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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la·nu·go   (lə-nōō'gō, -nyōō'-)   
n.   pl. la·nu·gos
A covering of fine, soft hair, as on a leaf, an insect, or a newborn child.

[Middle English, pith, from Latin lānūgō, down, from lāna, wool.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: la·nu·go
Pronunciation: l&-'n(y)ü-(")gO
Function: noun
: a dense cottony or downy growth; specifically : the soft downy hair that covers the fetus of some mammals
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

lanugo la·nu·go (lə-n&oomacr;'gō, -ny&oomacr;'-)
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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Science Dictionary
lanugo   (lə-n'gō)  Pronunciation Key 
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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