emissarium

Latin > English (Lewis & Short)

ēmissārĭum: ii, n. emitto,
I an outlet: lacūs, a drain, Cic. Fam. 16, 18; Plin. 33, 4, 21, § 75; Suet. Claud. 20, 32: vomicae, Scrib. Comp. 229; cf. collectionis, id. ib. 206.