sphinthrĭa or spintrĭa, ae, m. [from σφιγκτήρ, the contractile muscle of the anus],
a male prostitute , Tac. A. 6, 1; Suet. Tib. 43; id. Calig. 16; id. Vit. 3 fin. ; cf. Aus. Epigr. 119.