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Webster 1913 Edition

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Noun.

[See

(Anat.)

The soft woolly hair which covers most parts of the mammal fetus, and in man is shed before or soon after birth.

lanugo ‎(countable and uncountable, plural lanugos)

Soft down or fine hair, specifically that covering the human foetus or a tumorous area
- 1955, early spring mountains with young-elephant lanugo along their spines — Vladimir Nabokov, Lolita

lanugo ‎(uncountable, accusative lanugon)

lanugo m ‎(uncountable)