Daily Almanac for
Feb 12, 2012
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Car•bon•if•er•ous



Pronunciation: (kär"bu-nif'ur-us), [key] Geol.

—adj.
1. noting or pertaining to a period of the Paleozoic Era, including the Pennsylvanian and Mississippian periods as epochs, occurring from 345 million to 280 million years ago. See table under geologic time.
2. (l.c.) producing carbon or coal.

—n.
the Carboniferous Period or System.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

carbonic anhydrasecarbonium ion
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