Mestizo \Mes*ti"zo\, n.; pl. Mestizos. [Sp. mestizo; akin to OF. mestis, F. m['e]tis; all fr. (assumed) LL. mixtitius, fr. L. mixtus mixed, p. p. of miscere to mix. See Mix, and cf. Mestee, M['E]tif, M['E]tis, Mustee.]

The offspring of an Indian or a negro and a European or person of European stock. [Spanish America]

Mestizo wool, wool imported from South America, and produced by mixed breeds of sheep.

Source: Webster's Revised Unabridged Dictionary (1913)