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 (linguistics): Cline of instantiation, a concept in systemic functional linguistics Cline of grammaticality in grammaticalization