Lewis & Short

cĭlĭum, ii, n. [kindr. with Gr. κυλίς, κύλα].

  1. I. An eyelid, Paul. ex Fest. p. 43, 3 Müll.; Plin. 11, 39, 93, § 227; App. M. 10, p. 247, 10; Lact. Opif. Dei, 10 init.
  2. II. Transf., the lower eyelid (opp. supercilium): extremum ambitum genae superioris, Plin. 11, 37, 57, § 157.