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say it: trahy-AS-ik
triassic is a noun and adjective meaning "from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity". It carries 2 recorded senses.
from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
of or relating to or denoting the first period of the Mesozoic era
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for triassic come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.