cop·u·la /ˈkɑpjələ/ 名詞
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.
n : an equating verb (such as `be' or `become') that links the
subject with the complement of a sentence [syn: copulative,
[also: copulae (pl)]