Lewis & Short

glos, glōris, f. [Gr. γάλοως, Att. γάλως], a husband’s sister, sister-in-law.

  1. I. Lit., Dig. 38, 10, 4, § 6; Paul. ex Fest. p. 98 Müll.; Charis. p. 27; Aus. Idyll. monos. de hist. 13.
  2. II. Acc. to Non. 557, 6, also for fratria, but without an example.