Meaning of the word cline in English

What does cline mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

cline

US /klaɪn/
UK /klaɪn/

Noun

a gradation in one or more characteristics within a species or other group, especially between different populations in different geographical areas

Example:
The study revealed a genetic cline across the continent.
Bird size often shows a geographical cline, with larger individuals found in colder regions.