Lewis & Short

densĭtas, ātis, f. [densus], thickness, density (perh. not ante-Aug.).

  1. I. Lit.: limus spissatur et in densitatem coit, Plin. 35, 15, 51, § 178: chartae, id. 13, 12, 24, § 78: umoris, id. 11, 3, 2, § 6; Vulg. Isa. 9, 18 al.
  2. II. Trop.: sententiarum, Quint. 8, 5, 26: figurarum, id. 9, 2, 72.