annuation

noun

an·​nu·​a·​tion

ˌanyəˈwāshən

plural -s

1

: annual variation in the presence or absence or the abundance of particular members of a plant community usually relatable to annual climatic variation compare aspection

2

: ecological observations made over a period of years

Word History

Etymology

annu(al) + -ation

First Known Use

1939, in the meaning defined at sense 1

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