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1540s, "natural head of hair," from Middle French perruque (late 15c.), from Italian perrucca "head of hair, wig," of uncertain origin; supposed by some to be connected to Latin pilus "hair," "but the phonetic difficulties are considerable" [OED]. Meaning "artificial head of hair, periwig" is attested from 1560s.
man's wig, especially the type popular from the 17th to the early 19th century. It was made of long hair, often with curls on the sides, and drawn back on the nape of the neck