1
: a long-necked mammal (Lama vicugna synonym Vicugna vicugna) of the Andes from Peru to Argentina that is related to but somewhat smaller than the guanaco, has a light brown woolly coat that is paler below, is considered to the be ancestor of the alpaca, and has been historically hunted for its wool and meat
2
a
: the wool from the vicuña's fine lustrous undercoat
b
: a fabric made of vicuña wool
also
: a sheep's wool imitation of this
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Merriam-Webster unabridged
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