The Collaborative International Dictionary
Amphitrocha
Amphitrocha \Am*phit"ro*cha\ ([a^]m*f[i^]t"r[-o]k[.a]), n. [NL., fr. Gr. 'amfi` + trocho`s a wheel.] (Zo["o]l.) A kind of annelid larva having both a dorsal and a ventral circle of special cilia.