Pretertiary
Pronunciation : Pre*ter"ti*a*ry
Part of Speech : a.
Definition : Defn: Earlier than Tertiary.
(Geol.)
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder