alterne

noun
al·terne | \ˈȯlˌtərn\
plural -s

Definition of alterne 

: one of a group of adjoining plant communities usually sharply differentiated from one another a grass alterne on the southward-facing slope of a ridge contrasted with forest alterne on the northward-facing slope

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First Known Use of alterne

1916, in the meaning defined above

History and Etymology for alterne

French, from alterne, adjective, alternate, from Latin alternus

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The first known use of alterne was in 1916

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