A Kelvin wave is a type of oceanic wave that has a characteristic horizontal displacement and vertical temperature change. Synonyms for Kelvin wave include tropical oceanic Kelvin wave, oceanic Kelvin wave, and Kelvin sea wave. These waves are named after Lord Kelvin, who discovered them in the late 19th century. They are important phenomena in oceanography due to their significant impact on the Earth's climate and weather patterns. Other synonyms for Kelvin waves include atmospheric Kelvin wave, mixed Kelvin wave, and equatorial wave. While these terms are used interchangeably, each has unique characteristics and effects on the ocean and atmosphere.