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One of the distinct individuals of a colonial invertebrate animal, such as a bryozoan, that arise asexually by budding.

zo·oid′al (-oid′l) adj.
References in periodicals archive ?
Evolution of the Zooidal Behavior and Its Relation to Skeletal Structure of the Retiolitidae (Graptolithina).
The construction of cuticle and early stages of calcification in the zooidal bud of malacostegans.
Packaging" of abilities to compete and to resist disturbance has been also observed in some cheilostome bryozoans with zooidal budding (Hughes and Jackson 1992) and could be more common than generally thought.