- any crustacean of the former order or division Schizopoda, now divided into the orders Mysidacea, comprising the opossum shrimps, and Euphausiacea, comprising krill.
- belonging or pertaining to the Schizopoda.
- any of various shrimplike crustaceans of the former order Schizopoda, now separated into the orders Mysidacea (opossum shrimps) and Euphausiacea