Definition of


  1. (noun, animal) any animal lacking a backbone or notochord; the term is not used as a scientific classification
  2. (adj, all) lacking a backbone or spinal column

via WordNet, Princeton University

Synonyms of Invertebrate


Antonyms of Invertebrate


Origin of the word Invertebrate

  1. 1826, coined from L. in- "not" + vertebra "joint." Invertebrata as a biological classification was coined 1805 by Fr. naturalist Georges L?opole Chr?tien Fr?d?ric Dagobert, Baron Cuvier (1769-1832). more

via Online Etymology Dictionary, ©2001 Douglas Harper

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