melisma

This term is primarily used in musicology and technical discussions of vocal performance. It describes a specific ornamental technique where a single syllable is stretched across multiple notes, creating a fluid, winding melodic line. It is most commonly associated with genres like gospel, R&B, and traditional Arabic or Byzantine chant.

While often used interchangeably with "vocal run" or "riff" in contemporary pop music, "melisma" is the formal academic term. In a professional context, it implies a level of technical skill and intentionality in the ornamentation of a lyric to convey heightened emotion or spiritual intensity.