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invertebrate
The definition of an invertebrate is an animal without a backbone.
(noun)Any animal other than a fish, reptile, amphibian, bird or mammal is an example of an invertebrate.
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See invertebrate in Webster's New World College Dictionary
adjective
- not vertebrate; having no backbone, or spinal column
- of invertebrates
- having no moral backbone; lacking courage, resolution, etc.
Origin: ModL invertebratus
noun
any animal without a backbone, or spinal column; any animal other than a fish, amphibian, reptile, bird, or mammal
See invertebrate in American Heritage Dictionary 4
adjective
- Lacking a backbone or spinal column; not vertebrate.
- Of or relating to invertebrates: invertebrate zoology.
An animal, such as an insect or mollusk, that lacks a backbone or spinal column.
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