The Collaborative International Dictionary of English v.0.48:

Foraminifera \Fo*ram`i*nif"e*ra\, n. pl. [NL., fr. L. foramen,
   -aminis, a foramen + ferre to bear.] (Zool.)
   An extensive order of rhizopods which generally have a
   chambered calcareous shell formed by several united zooids.
   Many of them have perforated walls, whence the name. Some
   species are covered with sand. See Rhizophoda.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Foraminifera
    n 1: foraminifers [syn: Foraminifera, order Foraminifera]