SPHERE n.
Hence, any globe or globular body, especially a celestial one, as the sun, a planet, or the earth. Of celestial bodies, first the sun, A mighty sphere, he framed. Milton.
VACUOLE n.
A small air cell, or globular space, in the interior of organic cells, either containing air, or a pellucid watery liquid, or some special chemical secretions of the cell protoplasm. Contractile vacuole. (Zoöl.) See under Contractile, and see Illusts. of Infusoria, and Lobosa. -- Food vacuole. (Zoöl.) See under Food,…
VOLVOX n.
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…