Lewis & Short

conjunctīvus, a, um, adj. [conjungo], of connection or serving to connect, connective (in post-class. gram. lang.): particula (sc. autem), Tert. adv. Hermog. 26.
Esp. freq.: conjunctivus modus, or absol.: conjunc-tīvus, i, m., the conjunctive or subjunctive mood, Mart. Cap. 3, § 310 al.