The Collaborative International Dictionary
Infusorial
Infusorial \In`fu*so"ri*al\, a. (Zo["o]l.) Belonging to the Infusoria; composed of, or containing, Infusoria; as, infusorial earth.
Infusorial earth (Geol.), a deposit of fine, usually white, siliceous material, composed mainly of the shells of the microscopic plants called diatoms; also called diatomaceous earth, kieselguhr, and diatomite. It is used in polishing powder, and in the manufacture of dynamite.
Wiktionary
infusorial
a. of, relating to, or containing infusoria
Usage examples of "infusorial".
The white corpuscles of the blood of a frog, and the cilia on two infusorial animals, a Paramaecium and Volvox, were similarly affected by the poison.