arrector /ar·rec·tor/ (ah-rek´tor) pl. arrecto´res [L.] raising, or that which raises; an arrector muscle.
ar·rec·tor ( -r k tr,  -rk-)n. pl. ar·rec·to·res ( r k-tôr z) See erector. |
arrector
pl. arrectores [L.] raising, or that which raises; an erector muscle.
arrector pili muscle
smooth muscle that extends from the papillary zone of the dermis to the base of a hair follicle. Involuntary contraction causes hair erection which, in some species, is most noticeable on the neck and along the back (see hackles).
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