CMU English Pronouncing Dictionary Dictionary [with local updates] CMU Pronouncing Dictionary
WordNet (3.0) WordNet (3.0)
(n) from 310 million to 280 million years ago; warm climate; swampy land, Syn. Pennsylvanian period, Upper Carboniferous period, Upper Carboniferous
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
prop. n. The geological period from 280 million to 310 million years ago; -- it was characterized by a warm climate and abundance of swampy land.
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