Troch"o*sphere (?), n. [Gr. &?; a wheel +
sphere.] (Zoöl.) A young larval form of many
annelids, mollusks, and bryozoans, in which a circle of cilia is developed
around the anterior end.
Troch"o*sphere (?), n. [Gr. &?; a wheel +
sphere.] (Zoöl.) A young larval form of many
annelids, mollusks, and bryozoans, in which a circle of cilia is developed
around the anterior end.