gadoid Syllabification: (ga·doid)Pronunciation: /ˈgādoid/Definition of gadoid noun Zoology a bony fish of an order (Gadiformes) that comprises the cods, hakes, and their relatives. Origin: mid 19th century: from modern Latin gadus (from Greek gados 'cod') + -oidgadoid in other Oxford dictionaries Definition of gadoid in the British & World English dictionary