Copula

n.	1.	(Logic & Gram.) The word which unites the subject and predicate.
	2.	(Mus.) The stop which connects the manuals, or the manuals with the pedals; - called also coupler.

Noun

1.

copula - an equating verb (such as `be' or `become') that links the subject with the complement of a sentence Synonyms: copulative, linking verb

copulative, linking verb, verb