Copula

имя существительное 1) [лингвистика] (глагол-)связка Синоним(ы): linking verb 2) [анатомия] связка

Большой англо-русский словарь

Copula

noun Etymology: Latin, bond — more at couple something that connects: as a. the connecting link between subject and predicate of a proposition b. linking verb

Merriam-Webster's Collegiate Dictionary