View your list of saved words. (You can log in using Facebook.)
arrector pili muscle
arrector pi·li muscle
Definition of ARRECTOR PILI MUSCLE
: one of the small fan-shaped smooth muscles associated with the base of each hair that contract when the body surface is chilled and erect the hairs, compress an oil gland above each muscle, and produce the appearance of goose bumps—called also erector pili muscle, pilomotor muscle
Seen & Heard
What made you want to look up arrector pili muscle? Please tell us where you read or heard it (including the quote, if possible).