- 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.