- belonging to the Cetacea, an order of aquatic, chiefly marine mammals, including the whales and dolphins.
- a cetacean mammal.
- of, relating to, or belonging to the Cetacea, an order of aquatic placental mammals having no hind limbs and a blowhole for breathing: includes toothed whales (dolphins, porpoises, etc) and whalebone whales (rorquals, right whales, etc)
- a whale
