Vaginicola

from The Century Dictionary.

• noun The typical genus of Vaginicolinæ, having an erect sessile lorica without an inner valve. The genus was instituted by Lamarck, and contains many species, chiefly of fresh water, as V. crystallina.

from the GNU version of the Collaborative International Dictionary of English.

• proper noun (Zoöl.) A genus of Infusoria which form minute vaselike or tubular cases in which they dwell.