consonance

noun

Etymology: From Middle English consonance, from Middle French consonance, from Latin cōnsonantia. Doublet of consonancy. By surface analysis, con- + son- + -ance.

1. A form of rhyme having the same consonants but different vowels.
2. Harmony; agreement; absence of discordance.

   “Like a musical string, the optic nerve responds to the waves with which it is in consonance, while it refuses to be excited by others of almost infinitely greater energy, whose period of recurrence are not in unison with its own.”