Foraminifera

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Fo·ram·i·nif·e·ra

(fō-ram'i-nif'ĕr-ă, for'ă-mi-nif'er-ă),
A subclass of Rhizopoda possessing anastomosing pseudopodia; these form a network around the cell that usually develops into a complex calcareous shell; an important component of the ocean bottom and of rockbeds overlying oil deposits.
[L. foramen, aperture, + fero, to carry]
Farlex Partner Medical Dictionary © Farlex 2012

Foraminifera

amoeboid PROTOZOANS that possess chitinous, calcareous or siliceous shells that are usually many-chambered. Calcareous Foraminifera are the main constituent of chalk.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005