Pronunciation : Li"as
Part of Speech : n.
Etymology : [Cf. F. lias, fr. liais sort of limestone, OF. also liois; perh. of Celtic origin, cf. Armor. liach, leach, a stone, Gael. leac, W. llech. Cf. Cromlech.] (Geol.)
Definition : Defn: The lowest of the three divisions of the Jurassic period; a name given in England and Europe to a series of marine limestones underlying the O?lite. See the Chart of Geology.
Source : Webster's Unabridged Dictionary, 1913