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1. Oxford American Dictionary

   foraminifer

   • IPA[ˌfôrəˈminəfər]

   美式

   • n.
     a single-celled planktonic animal with a perforated chalky shell through which slender protrusions of protoplasm extend. Most kinds are marine, and when they die, their shells form thick ocean-floor sediments.

   • noun: foraminifer, plural noun: foraminifers

2. • 更多解釋

   foraminifer

   • IPA[ˌfɒrəˈmɪnɪfə]

   英式

   • n.
     a single-celled planktonic animal with a perforated chalky shell through which slender ...

   Oxford Dictionary