phorozoon

phor·o·zo·on

(fōr'ō-zō'on),
The nonsexual stage in the life history of an animal that passes through several phases in its life cycle.
[phoro- + G. zōon, animal]

phorozoon

(fō″rō-zō′ŏn) [Gr. phoros, fruitful, + zoon, animal]
An asexual stage of a multistage animal life cycle.