KD

$K_{d}$ is the dissociation constant, a specific type of equilibrium constant.

KD may also refer to:

• Kappa Delta, a National Panhellenic sorority
• Kawasaki disease, an autoimmune disease
• KD Avia, a defunct Russian airline that used the IATA code "KD"
• KD Station, a retail and entertainment attraction once built inside the facilities of a former meat packing plant
• Khaki drill, a fabric used in 20th-century British military uniforms
• Knock-down kit, a kit containing the parts needed to assemble a product
• Known Depredator, an Indian term for a criminal
• Köln-Düsseldorfer, a river cruise operator based in Cologne, Germany
• Kraft Dinner, a macaroni and cheese convenience food
• Kuwaiti dinar, the currency of Kuwait
• Kapal DiRaja, ship prefix used in the Royal Malaysian Navy

Persons with the initials

• k.d. lang (born November 2, 1961), a Canadian pop and country singer-songwriter and occasional actress
• Kevin Durant, basketball player