foraminifer
for·a·min·i·fer
noun \ˌfȯr-ə-ˈmi-nə-fər, ˌfär-\Definition of FORAMINIFER
: any of an order (Foraminifera) of large chiefly marine rhizopod protozoans usually having calcareous shells that often are perforated with minute holes for protrusion of slender pseudopodia and form the bulk of chalk and nummulitic limestone
— fo·ra·mi·nif·er·al \fə-ˌra-mə-ˈni-f(ə-)rəl; ˌfȯr-ə-mə-ˈni-, ˌfär-\ adjective
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First Known Use of FORAMINIFER
circa 1842
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