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"worms are an example of invertebrate animals"adjectivelacking a backbone or spinal column
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nounany animal lacking a backbone or notochord; the term is not used as a scientific classification
Synonyms & Similar Words
animal beast creature worm brute sponge spineless shellfish fauna mollusk borer arthropod mollusc animate being comb jelly ctenophore echinoderm ectoproct entoproct zoophyte brachiopod bryozoan cnidarian coelenterate sipunculid symbion pandora woodborer lamp shell lampshell moss animal parazoan peanut worm phoronid polyzoan poriferan rotifer sea mat sea moss