Wiktionary
a. (context physics English) Having a frequency that is a fraction of a fundamental frequency n. Such a frequency
Wikipedia
Subharmonic was an independent record label based in New York City. It primarily issued music with strong ambient and dub music influence. Its sub-label was Strata Records, which issued all its albums in an opaque black container. The label was founded in 1993 by music producers Bill Laswell, John Matarazzo and Robert Soares. A falling out with Matarazzo occurred during the mid-nineties, effectively ending the label's activities.
Usage examples of "subharmonic".
Leave so much as the minutest particle of crystal dust and it'll jam the manual and produce all kinds of subharmonics in the logic translator.
In some Earth languages, such as Mandarin, Chinese, words superficially identical have different meanings dependent not only on inflection and relative pitch but on the harmonic and subharmonic content as well.
Then the savage lash of subharmonics which heralded the opening of a major temporal gate struck Skeeter square in the skull bones.
A fierce headache comprised of equal parts low blood sugar, stress, and gate subharmonics blossomed, causing him to wince.
Then the gate rumbled open with a skull-splitting backlash of subharmonics and the returning tour staggered through, jabbering animatedly.