cretaceous period
English Thesaurus
1. from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants (noun.time)
| instance hypernym | : | geological period, period, |
| definition | : | a unit of geological time during which a system of rocks formed (noun.time) |
| derivation | : | cretaceous, |
| definition | : | of or relating to or denoting the third period of the Mesozoic era (adj.pert) |
| derivation | : | cretaceous, |
| definition | : | of or relating to or denoting the third period of the Mesozoic era (adj.pert) |
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