Lewis & Short

ămictōrĭus, a, um, adj. [amicio], suitable for throwing about one: linteamen, Cod. Th. 8, 5, 48, § 1.
Hence, subst.: ămic-tōrĭum, i, n., a garment which is thrown about or over one, a light, loose garment, esp. of women, a scarf, a tie for the neck, Cod. Th. 8, 5, 48; Hier. ad Isa. 2, 3, v. 23.