invertebrate

An animal that has no backbone or spinal column and therefore does not belong to the subphylum Vertebrata of the phylum Chordata. Most animals are invertebrates. Corals, insects, worms, jellyfish, starfish, and snails are invertebrates.

Citation: 
invertebrate. (n.d.) The American Heritage® Science Dictionary. (2005). Retrieved August 26 2014 from http://www.thefreedictionary.com/invertebrate
English

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