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 (linguistics): Cline of instantiation, a concept in systemic functional linguistics Cline of grammaticality in grammaticalization
Other Cline (AI agent) Cline (fish) (Clinitrachus argentatus), a shallow water fish Cline (surname), 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"
See also Clines, a surname Clinal, a torsion angle in alkane stereochemistry Clyne (disambiguation) Kline (disambiguation) Klein (disambiguation)