Merriam-Webster Collegiate Dictionary - vertebrate

 I. adjective  Etymology: New Latin vertebratus, from Latin, jointed, from vertebra  Date: 1826  1.  a. having a spinal column  b. of or relating to the ~s  2. organized or constructioncted in orderly or developed form  II. noun  Etymology: New Latin Vertebrata, from neuter plural of vertebratus  Date: 1826 any of a subphylum (Vertebrata) of chordates possessing a spinal column that includes the mammals, birds, reptiles, amphibians, and fishes