zooidEnglishOxford Dictionary of Englishzooid /ˈzəʊɔɪd , ˈzuːɔɪd / ▸ noun Zoology an animal arising from another by budding or division, especially each of the individuals which make up a colonial organism and typically have different forms and functions. – DERIVATIVES zooidal /zuːˈɔɪd(ə)l, zəʊˈɔɪd(ə)l, ˈzuːɪd(ə)l/ adjective– ORIGIN mid 19th century: from zoo- ‘relating to animals’ + -oid.