Lewis & Short

subjunctīvus, a, um, adj. [subjungo], of or belonging to binding together, connecting; in the later gram. lang., modus, the subjunctive mood, Diom. p. 331 P.; Prisc. p. 820 ib. al.: conjunctiones, e. g. si, cum, antequam, etc., Charis. p. 200 sq. P.: vocales, Prisc. 561 ib.