connective

(noun) an uninflected function word that serves to conjoin words or phrases or clauses or sentences. Synonyms: conjunction, conjunctive, continuative.

(noun) an instrumentality that connects. Synonyms: connection, connexion, connector, connecter. Examples: "He soldered the connection." "He didn't have the right connector between the amplifier and the speakers."

(adj) connecting or tending to connect. Examples: "Connective remarks between chapters." "Connective tissue in animals." "Conjunctive tissue in plants."