Definify.com
Webster 1913 Edition
Lias
Li′as
(lī′as)
, Noun.
[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.)
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 Oölite. See the Chart of
Geology
. Webster 1828 Edition
Lias
LI'AS
,Noun.