1. chordate - Noun
2. chordate - Adjective
any animal of the phylum Chordata having a notochord or spinal column
of or relating to or characteristic of the Chordata
Source: WordNetPikaia was an early chordate from the Middle Cambrian Opabinia was a creature with an unusual body plan; it was probably related to arthropods Protichnites were the trackways of arthropods that walked Cambrian beaches. Source: Internet
Thus these marine worms, described to be the sister group of the echinoderms (such as sea urchins), are of great interest for the study of the origins of chordate development. Source: Internet