Jura-trias
Pronunciation : Ju`ra-tri"as
Part of Speech : n.
Definition : Defn: A term applied to many American Mesozoic strata, in which the characteristics of the Jurassic and Triassic periods appear to be blended. -- Ju`ra-tri*as"sic, a.
(Geol.)
Source : Webster's Unabridged Dictionary, 1913