invertebrate
nounUK /ɪnˈvɜː.tɪ.brət/
US /ɪnˈvɝː.t̬ə.brət/
An invertebrate is an animal that does not have a backbone.
A butterfly is an invertebrate because it has no bones inside its body.
OTHER MEANINGS
2. Relating to animals that lack a backbone.
Scientists studied the invertebrate species living in the tide pool.
3. A person who lacks courage or resolve.
He was called an invertebrate for refusing to stand up for his friends.
4. Lacking a spinal column in structure.
The invertebrate body of the octopus is soft and flexible.