Are the Way of the Four Element monks “disciplines” spells?

@JeremyECrawford Hello Jeremy, are the Way of the Four Element monks "disciplines" spells? In example the "Fist of Unbroken Air"

— Glacial Relic (@GlacialRelic) February 6, 2017

Elemental Disciplines are magical, as the text states. A non-spell is only considered a spell if its text says it is. #DnD https://t.co/I9RcLM1gPa

— Jeremy Crawford (@JeremyECrawford) February 6, 2017