Definition of isocline in US English:



  • A line on a diagram or map connecting points of equal gradient or inclination.

    • ‘When resources synergistically improve performance, combinations yielding equal benefits are represented by an isocline that is convex to the origin.’
    • ‘The null isoclines give the threshold of zero growth for each of the two species, and their intersection specifies the equilibrium point.’
    • ‘Because this would change the slope of the isocline, it could be an important mechanism promoting coexistence when habitat selection is constrained.’
    • ‘For example, one might assess whether the distance along a river or a topographic isocline is more biologically relevant than distance ‘as the crow flies.’’
    • ‘The isocline and full system analyses show similar patterns when there is variation in performance.’


Late 19th century (denoting an isoclinal line or fold): from Greek isoklinēs ‘equally balanced’, from klinein ‘to lean, slope’.