cline

noun

(systematics) A gradation in a character or phenotype within a species or other group. / Any graduated continuum.

The cline of the mountain range is clearly visible from the valley.

意味（1）

(systematics) A gradation in a character or phenotype within a species or other group.

意味（2）

Any graduated continuum.

This account effectively reconstructs the well-known grammaticalisation cline from anaphora to agreement, …