A guyot /ˈɡiːjoʊ/, also known as a tablemount, is an isolated underwater volcanic mountain (seamount), with a flat top over 200 meters (660 feet) below the surface of the sea. The diameters of these flat summits can exceed 10 km (6.2 mi).

The guyot was named after the Swiss-American geographer and geologist Arnold Henry Guyot (died 1884). The term was coined by Harry Hammond Hess. Guyots are most commonly found in the Pacific Ocean. Guyots show evidence of having been above the surface with gradual subsidence through stages from fringed reefed mountain, coral atoll, and finally a flat topped submerged mountain. Their flatness is due to erosion by waves, winds, and atmospheric processes. The steepness gradient of most guyots is about 20 degrees. To technically be considered a guyot or tablemount, they must stand at least 3000 ft (900 m) tall. However, there are many undersea mounts that can range from just less than 300 ft to around 3000 ft. Very large oceanic volcanic constructions, hundreds of kilometers across, are called oceanic plateaus. Seamounts are made by extrusion of lavas piped upward in stages from sources within the Earth's mantle to vents on the seafloor. Seamounts provide data on movements of tectonic plates on which they ride, and on the rheology of the underlying lithosphere. The trend of a seamount chain traces the direction of motion of the lithospheric plate over a more or less fixed heat source in the underlying asthenosphere part of the Earth's mantle. There are thought to be an estimated 2,000 seamounts in the Pacific basin. The Emperor Seamounts are an excellent example of an entire volcanic chain undergoing this process and contain many guyots among their other examples.

Commandant Virginie Guyot (born 30 December 1976 in Angers) is a fighter pilot of the Armée de l'Air who achieved an historical first when she was appointed leader of the Patrouille de France, becoming the first woman in the world to command a precision aerobatic demonstration team.

After following high school and scientific classes prépa in the Prytanée Militaire, an advanced military secondary institution, Virginie Guyot entered the Ecole de l'Air, the French Air Force officers' school, in 1997. After her degree, she joined the fighter pilot training Air Force base in Tours.

She received her fighter pilot wings in 2002, just three years after Caroline Aigle, the first woman to reach that position in the history of the Armée de l'Air. She was assigned to the Mirage F1-CR in the Escadron de reconnaissance 2/33 Savoie.

She was engaged in operations in Chad, Tajikistan and Afghanistan. Chef d'escadron (squadron leader) since 2007, she was promoted to the rank of Commandant (Major) in 2009.

At the same time, she was the first woman to join the Patrouille de France, one of the world's oldest and most skilled demonstration teams, in which she was directly appointed as Charognard (deputy leader). On 25 November 2009, she became the first, and so far only, woman to lead a prestigious aerobatic team.

Claire Guyot (Born June 28, 1966) is a French actress and singer, known for her prolific dubbing of foreign productions. She is also artistic director of dubbing. Most notably for the famous American actresses, Wionna Ryder, Teri Hatcher, and Sarah Michelle Gellar.