any chiefly marine protozoan of the sarcodinian order Foraminifera, typically having a linear, spiral, or concentric shell perforated by small holes or pores through which pseudopodia extend.
for·a·min·i·fer (fôr'ə-mĭn'ə-fər, fŏr'-) n. Any of the chiefly marine protozoans of the order Foraminifera, characteristically having a calcareous shell with perforations through which numerous pseudopods protrude.
[From New Latin Forāminifera, order name : Latin forāmen, forāmin-, an opening + Latin -fer, -fer.] fo·ram'i·nif'er·ous (fə-rām'ə-nĭf'ər-əs), fo·ram'i·nif'er·al adj.