Moving the hair; denoting the arrectores pilorum muscles of the skin and the postganglionic sympathetic nerve fibres innervating these small smooth muscles. ... Origin: pilo-+ L. Motor, mover ... (05 Mar 2000) ... 
(pi″lo-mo´tәr) pertaining to the arrector pili muscles and horripilation.
Type: Term Pronunciation: pī′lō-mō′tŏr Definitions: 1. Moving the hair; denoting the arrectores pilorum muscles of the skin and the postganglionic sympathetic nerve fibers innervating these small smooth muscles.
pilomotor 1. A reference to the arrector muscles, the contraction of which produces cutis ansertina (goose flesh) and the erection of the hairs. 2. Causing movements of hairs, as the arrectores pilorum.
Latin pilus = a hair, and movere = to move; hence the action of the arrectores pilorum muscles.