Copula
Pronunciation : Cop"u*la
Part of Speech : n.
Etymology : [L., bond, band. See Couple.]
Definition : 1. (Logic & Gram.)
Defn: The word which unites the subject and predicate.
2. (Mus.)
Defn: The stop which connects the manuals, or the manuals with the pedals; -- called also coupler.
Source : Webster's Unabridged Dictionary, 1913