- invertebrate - lacking a backbone or spinal column; "worms are an example of invertebrate animals"
Antonym: vertebrate
- invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
--1 is a kind of animal, animate being, beast, brute, creature, fauna
--1 has parts: foot, invertebrate foot; peristome
--1 has particulars: