noun
- Marine mammals of the order Cetacea, including whales, dolphins, and porpoises, characterized by flippers, a blowhole, and streamlined bodies.
Usage: Plural form; singular is cetacean.; Scientific/biological term commonly used in educational contexts.
Examples
- Cetaceans are among the most intelligent animals on Earth.
- Whales and dolphins are both types of cetaceans.
- Many cetaceans migrate thousands of miles each year.
- Scientists study cetaceans to understand their complex social behaviors.
- Cetaceans breathe air through blowholes on the tops of their heads.
- Some cetaceans, like humpback whales, are known for their songs.