- heterozooid
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n. [Gr. heteros, different; zoon, animal](BRYOZOA: Gymnolaemata)A specialized zooid that forms stolons, attachment discs, rootlike structures and other such vegetative parts of the colony; a bryozoan, such as an avicularium or a rhizoid.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.