A rhythmic ratio in which two beats are felt in the time of three, or vice versa, producing a momentary shift in pulse. An elegant misalignment that makes the music lean forward. Where syncopation displaces accents, hemiola is mathematical at heart: proportion turned into motion.

From Greek hēmiolios “one and a half,” from hēmi- “half” + holos “whole.” The word began as a numerical relation and became, in practice, a sensation: the body counting differently for a moment.