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Pronunciation:  in'vurtubrit

WordNet Dictionary
  1. [n]  any animal lacking a backbone or notochord; the term is not used as a scientific classification
  2. [adj]  (zoology) lacking a backbone or spinal column; "worms are an example of invertebrate animals"

INVERTEBRATE is a 12 letter word that starts with I.


 Antonyms: vertebrate
 See Also: animal, animate being, arthropod, beast, borer, brachiopod, brute, bryozoan, cnidarian, coelenterate, comb jelly, creature, ctenophore, echinoderm, ectoproct, entoproct, fauna, foot, invertebrate foot, lamp shell, lampshell, mollusc, mollusk, moss animal, parazoan, peanut worm, peristome, phoronid, polyzoan, poriferan, rotifer, sea mat, sea moss, shellfish, sipunculid, sponge, Symbion pandora, woodborer, worm, zoophyte



Webster's 1913 Dictionary
\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

{Age of invertebrates}. See {Age}, and {Silurian}.

Biology Dictionary
 Definition: Generally, any animal that does not have a spine (vertebrae). Specifically, any animal which is not taxonomically classified within phylum Chordata and subphylum Vertebrata.
Thesaurus Terms
 Related Terms: 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, Milquetoast, 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, weakling, weak-minded, weak-willed, white feather, white liver