Lewis & Short

căpillātūra, ae, f. [capillatus], prop.,

  1. I. the being hairy; and then per meton., the hair; esp. false hair (post-Aug.), Plin. 37, 11, 73, § 190; Tert. Cult. Fem. 7; Cael. Aur. Tard. 1, 1, 35; id. Acut. 1, 4, 79; 2, 9, 41.
  2. II. Transf., the hair-like streaks in precious stones, Plin. 37, 11, 73, § 190.