a. Geol. Also liasic. [f LIAS + -IC.] Pertaining to the lias formation.
1833. Lyell, Princ. Geol., III. 378. Metamorphic rocks of the Eocene or Liassic eras.
1854. A. Adams, etc., Man. Nat. Hist., 561. In the Liasic period of the secondary formations.
1854. H. Miller, Sch. & Schm., ii. 37. The first ammonite I ever saw was a specimen … from one of the liasic deposits of England. Ibid., xxi. 451. Both shale and nodules bore, instead of the deep liasic gray, an olivaceous tint.
