cline(redirected from clinal)
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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]
Farlex Partner Medical Dictionary © Farlex 2012
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
clinea gradual and continuous (or nearly continuous) change in a character (such as size or colour) in relation to its geographical or ecological distribution. For example, there is an increase in the percentage of bridled forms in the guillemot population with more northerly latitudes.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005