from The Century Dictionary and Cyclopedia
- n. A genus of marsh or aquatic plants, of the natural order Halorageæ; the mare's-tails.
- n. In zoology, a genus of fishes.
- n. [lowercase] In anatomy, the leash of nerves in which the spinal cord ends; the cauda equina, or horsetail.
Sorry, no etymologies found.
One of these fish, the dorado Coryphæna hippuris is even sometimes called a ‘dolphin’.