Found 2 items, similar to invertebrate.
English → English (WordNet) Definition: invertebrate invertebrate adj : lacking a backbone or spinal column; “worms are an example of invertebrate animals” [ant: vertebrate] invertebrate n : any animal lacking a backbone or notochord; the term is not used as a scientific classification
English → English (gcide) Definition: Invertebrate Invertebrate \In*ver"te*brate\, a. (Zo["o]l.) Destitute of a backbone; having no vertebr[ae]; of or pertaining to the Invertebrata. -- n. One of the Invertebrata. [1913 Webster] Age of invertebrates. See Age, and Silurian. [1913 Webster]