Tertiary_periodWordNet Explorer
Explore synonyms, antonyms, hypernyms, hyponyms, and semantic relationships for “Tertiary_period” powered by Princeton WordNet.
noun
from 63 million to 2 million years ago
Words in this synset: Tertiary
noun
approximately the last 63 million years
noun
from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals
noun
from 25 million to 13 million years ago; appearance of grazing mammals
noun
from 40 million to 25 million years ago; appearance of sabertoothed cats
noun
from 58 million to 40 million years ago; presence of modern mammals
noun
from 63 million to 58 million years ago; appearance of birds and earliest mammals