Definition that contains spinal column
- float an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
- spineless lacking a backbone or spinal column
- vertebra one of the bony segments of the spinal column
- vertebrate animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
- vertebrate having a backbone or spinal column
- invertebrate lacking a backbone or spinal column
- cephalochordate fish-like animals having a notochord rather than a true spinal column
- swim bladder an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
- intervertebral disk a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two)
- chordate any animal of the phylum Chordata having a notochord or spinal column