a. Obs. rare1. [ad. L. symphōniacus or Gr. συμφωνιακός, f. συμφωνία SYMPHONY: see -AC.] Characterized by symphony or harmony; in quot., sung by the whole choir together, as opp. to antiphonal. So † Symphoniacal a., harmonious; consonant, accordant; whence † Symphoniacally adv., in a consonant manner.
1635. Brathwait, Five Senses, II. v. 136. Yet may wee collect Symphoniacally, though not analogically nor proportionally, by the Excellence of the Creature, the infinite goodnesse of the Creator.
1650. Charleton, Paradoxes, Ep. Ded. 10. That the Latin is the most symphoniacall and Concordant Language.
1665. E. Maynwaring, Treat. Scurvy, 56. A pitch of energy, symphoniacal with vital principles.
1776. Hawkins, Hist. Mus., I. III. iv. 289, note. This distinction between symphoniac and antiphonal psalmody.