harmŏnĭcus — Lewis & Short
harmŏnĭcus, a, um, adj., = a(rmoniko/s,
I 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.