Lewis & Short

instĭtōrĭus, a, um, adj. [institor], of or relating to institores (post-Aug.).

  1. I. Adj.: operae, Suet. Ner. 21: artes, Hier. ap. Helv. 21: actio, Dig. 14, 3; Gai. Inst. 4, 71; 74.
  2. II. Subst.: instĭtōrĭa, ae, f., a female broker or huckster, Dig. 14, 3, 5.