From The Collaborative International Dictionary of English v.0.44 [gcide]:
Invertebrate \In*ver"te*brate\, adjective (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) 2.0 [wn]:
adjective
1: lacking a backbone or spinal column; "worms are an example of invertebrate animals" [ant: {vertebrate}]
noun
1: any animal lacking a backbone or notochord; the term is not used as a scientific classification
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
90 Moby Thesaurus words for "invertebrate": Milquetoast, abulic, afraid, amphibian, aquatic, baby, big baby, biped, canine, cannibal, carnivore, chicken, chicken liver, cosmopolite, coward, cowardly, crustacean, crustaceous, crybaby, disorganized, doormat, dull tool, emasculate, faint, fainthearted, feeble, feebleminded, feline, forceless, fraid-cat, fraidy-cat, frail, funk, funker, gnawer, gutless wonder, herbivore, impotent, inadequate, ineffective, ineffectual, infirm, insectivore, jellyfish, lightweight, lily liver, mammal, mammalian, marsupial, marsupialian, meek soul, milksop, molluscan, mollycoddle, mouse, namby-pamby, nebbish, nonentity, omnivore, pansy, pantywaist, pliable, primate, protozoan, protozoic, pushover, quadruped, reptile, rodent, ruminant, sad sack, scaredy-cat, scavenger, sissy, softling, softy, sop, spineless, ungulate, varmint, vermin, vertebrate, weak, weak sister, weak-kneed, weak-minded, weak-willed, weakling, white feather, white liver
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