Lewis & Short

† ĕpī̆crŏcum, i, n., = ἐπίκροκον (v. Lid. and Scott sub h. v.),

  1. I. a fine, transparent garment worn by women, Naev. ap. Varr. L. L. 7, § 53 Müll.; Varr. ap. Non. 318, 25; cf. Paul. ex Fest. p. 82, 13 Müll.
  2. II. Transf., adj., transparent, fine, thin, Plaut. Pers. 1, 3, 16.