Hypertext Webster Gateway: "invertebrate"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
{Age of invertebrates}. See {Age}, and {Silurian}.
From WordNet (r) 1.7 (wn)
invertebrate
adj : (zoology) lacking a backbone or spinal column; "worms are an
example of invertebrate animals" [ant: {vertebrate}]
n : any animal lacking a backbone or notochord; the term is not
used as a scientific classification
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