Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun tertiary_period

1 sense of tertiary period

Sense 1
Tertiary, Tertiary period -- (from 63 million to 2 million years ago)
       INSTANCE OF=> period, geological period -- (a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods")