copula

Pronunciation: /ˈkɒpjʊlə/

The English word “copula” has 5 meanings listed here.

noun

A word, usually a verb, used to link the subject of a sentence with a predicate (usually a subject complement or an adverbial), that unites or associates the subject with the predicate.
The bond or relationship by which two things are combined into a unity.
A function that represents the association between two or more variables, independent of the individual marginal distributions of the variables.
A device that connects two or more keyboards of an organ.
The act of copulation; mating.

Borrowed from Latin cōpula (“connection, linking of words”), from co- (“together”) + apere (“fasten”). Doublet of couple.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.