The Collaborative International Dictionary of English v.0.48:
Foraminifer \For`a*min"i*fer\, n. (Zool.) One of the Foraminifera. [1913 Webster]WordNet (r) 3.0 (2006):
foraminifer n 1: marine microorganism having a calcareous shell with openings where pseudopods protrude [syn: foram, foraminifer]