foraminifer

noun
for·​a·​min·​i·​fer | \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

Illustration of foraminifer

Illustration of foraminifer

foraminifer shells

Other Words from foraminifer

foraminiferal \fə-​ˌra-​mə-​ˈni-​f(ə-​)rəl; ˌfȯr-​ə-​mə-​ˈni-​, ˌfär-​ \ adjective

First Known Use of foraminifer

circa 1842, in the meaning defined above

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The first known use of foraminifer was circa 1842

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