cline(redirected from Clines)
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Related to Clines: sibling species
A systematic relation between location and the frequencies of alleles; lines connecting points of equal frequency are termed isoclines, and the direction of the cline at any point is at right angles to an isocline.
[G. klinō, to slope]
A gradual change in a character or feature across the distributional range of a species or population, usually correlated with an environmental or geographic transition.
clin′al (klī′nəl) adj.