Lewis & Short

tĕnē̆brĭo, ōnis, f. [tenebrae], one who shuns the light, a trickster, swindler (ante-class.): tenebrio Tyrius, Afran. ap. Non. 19, 4 (Com. Fragm. v. 109 Rib.); Varr. ib. 6 and 13.