kamet
- n a mountain in the Himalayas in northern India (25,450 feet high)
katsina
- n a city in northern Nigeria; a major center of the Hausa people
jacques loeb
- n United States physiologist (born in Germany) who did research on parthenogenesis (1859-1924)
jacobite
- n a supporter of James II after he was overthrown or a supporter of the Stuarts
jackie robinson
- n United States baseball player; first Black to play in the major leagues (1919-1972)
jackknife
- n a large knife with one or more folding blades
- n a dive in which the diver bends to touch the ankles before straightening out
- v dive into the water bending the body at the waist at a right angle, like a jackknife
jackknife-fish
- n black-and-white drumfish with an erect elongated dorsal fin