Lewis Short
(adjective) = ἁρμονικός: harmŏnĭcus, a, um
* Of or belonging to agreement or harmony, harmonious, harmonic (very rare): res,Varr. L. L. 10, § 64 Müll.: harmonica ratio, quae cogit rerum naturam sibi ipsam congruere,Plin. 2, 109, 113, § 248: tinnitus,Mart. Cap. 1, § 27.
Charlton T. Lewis, Charles Short, A Latin Dictionary