VOLVOX
Volvox, genus Volvox
(noun) type genus of the Volvocaceae; minute pale green flagellates occurring in tiny spherical colonies; minute flagella rotate the colony about an axis
Source: WordNet® 3.1
Etymology
From the genus name.
Noun
volvox (plural volvoxes)
(zoology) Any of the genus Volvox of chlorophytes.
Source: Wiktionary
Vol"vox, n. (Bot.)
Definition: A genus of minute, pale-green, globular, organisms, about one
fiftieth of an inch in diameter, found rolling through water, the
motion being produced by minute colorless cilia. It has been
considered as belonging to the flagellate Infusoria, but is now
referred to the vegetable kingdom, and each globule is considered a
colony of many individuals. The commonest species is Volvox globator,
often called globe animalcule.
Source: Webster’s Unabridged Dictionary 1913 Edition