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foraminifer
noun pl. foraminifera
any of an order (Foraminiferida) of marine protozoans with calcareous shells full of tiny holes through which slender filaments project: they form the main component of chalk and many deep-sea oozes
also called foraminiferan
Related Forms:
- foraminiferal adjective or foraminiferous
See foraminifer in American Heritage Dictionary 4
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