Lewis & Short

factīcĭus (-tĭus), a, um, adj. [facio], made by art, artificial, factitious (postAug.).

  1. I. In gen.: sal, Plin. 31, 7, 39, § 81: colores, id. 31, 7, 42, § 91; 35, 6, 24, § 40: ladanum (opp. terrenum), id. 12, 17, 37, § 75.
  2. II. In the later grammarians: nomen, formed to imitate the natural sound, onomato-poetic, like tintinnabulum, turtur, Prisc. p. 581 P.