invertebrate definition

  • adjective:
    • Lacking a backbone or spine; perhaps not vertebrate.
    • Of or concerning invertebrates: invertebrate zoology.
    • Lacking a backbone.
    • Destitute of a backbone; having no vertebr√¶; of or pertaining to the Invertebrata.
    • lacking a backbone or spine
  • noun:
    • An animal, such as an insect or mollusk, that lacks a backbone or spinal column.
    • An animal without vertebrae, for example. anchor.
    • An invertebrated animal; any one of the Invertebrata.
    • any pet lacking a backbone or notochord; the definition of is not used as a scientific classification
  • others:
    • Not vertebrate; having no backbone; especially, of or pertaining to the Invertebrata. Also invertebral, invertebrated.
    • Figuratively, flaccid, like from not enough a backbone; wanting energy, tone, or consistency; weak; nerveless.

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