- cetaceanPertaining to the zoologic infraorder Cetacea, or associated with species falling under that taxonomic hierarchy.
- CetusA winter constellation of the northern sky, said to resemble a whale. It includes the star Mira.
- cetaneThe aliphatic hydrocarbon C₁₆H₃₄ (hexadecane) used as a standard for diesel fuel.
- cetoleicOf or pertaining to cetoleic acid or its derivatives