Invertebrate

a.

1.

(Zool.) Destitute of a backbone; having no vertebræ; of or pertaining to the Invertebrata. Age of invertebrates See Age, and Silurian.

Noun	1.	invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
Adj.	1.	invertebrate - lacking a backbone or spinal column; "worms are an example of invertebrate animals" Antonyms: vertebrate - having a backbone or spinal column; "fishes and amphibians and reptiles and birds and mammals are verbetrate animals"

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