Source : Webster's Revised Unabridged Dictionary (1913)

Chordata \Chor*da"ta\, n. pl. [NL., fr. L. chorda cord.]
   (Zo["o]l.)
   A comprehensive division of animals including all Vertebrata
   together with the Tunicata, or all those having a dorsal
   nervous cord.

Source : WordNet®

Chordata
     n : comprises true vertebrates and animals having a notochord
         [syn: {phylum Chordata}]