Cline

Cline may refer to:

Science

 * Cline (biology), a measurable gradient in a single trait in a species across its geographical range
 * Cline (hydrology), a fluid layer with a property that varies
 * Cline (mathematics) or generalised circle, a circle or straight line in inverse geometry
 * Cline of instantiation, a concept in systemic functional linguistics

Other

 * Cline (fish) (Clinitrachus argentatus), a shallow water fish
 * Cline (surname), a given name and a family name (including a list of persons with the name)
 * Cline River, in Alberta, Canada
 * Cline, Texas in Uvalde County, Texas
 * Cline Avenue, a road in Indiana, US
 * Antonov An-32, a military transport aircraft, whose NATO reporting name is "Cline"