Definition
"Chordate" refers to an animal belonging to the phylum Chordata, characterized by having a notochord (a flexible rod-like structure) at some stage of development. This phylum includes vertebrates (animals with backbones) like humans, fish, birds, and reptiles. It's a broad category encompassing a huge range of animals. Think of it as the family tree that includes anything with a spinal cord or related structure. It is very inclusive.