Which biology term means an animal without a spine?

Lil, you are right

I knew that.

jsh, ditto ditto

Biological/Mojo, no they're invertebrates, the antonym of vertebrates, which is they are two categories of describing if the animal has backbones or Not. for beginners, that means the word vertebrates means it has a back bone and on the other invertebrates is it's opposite

jsh, Hi Jsh I thought Squid are back boneless??

biology my best subject at college

Good question and informative answer. Thank you.