σφιγκτήρ

A. that which binds tight, lace, band, etc., κόμας σφιγκτῆρα . . κεκρύφαλον AP 6.206 (Antip. Sid.); ς. δεσμός Nonn. D. 16.391.

II. muscle closing an aperture which naturally remains in the state of contraction, AP 12.7 (Strat.), Heliod. ap. Orib. 44.23.55, Sor. 1.16, Gal. UP 4.19, Paul.Aeg. 6.78.

III. a Tarentine χιτών, prob. because laced tight to the body, Hsch.