I. noun 1. a long-haired domesticated South American mammal related to the llama, valued for its wool.● Lama pacos, family Camelidae, probably descended from the wild guanaco. 2. [ mass noun] — the wool of the alpaca. • a mixture of wool, alpaca, and silk.
3. [ mass noun] — fabric made from alpaca wool[as modifier] • an alpaca jersey.
– origin late 18th cent.: from Spanish, from Aymara allpaca.