What term is used for a soft musical dynamic?

The term that denotes a soft musical dynamic is "piano." In musical notation, "piano" instructs the performer to play softly. This dynamic is often used in compositions to convey a sense of calmness or tenderness, distinguishing it from louder dynamics.

In contrast, mezzo forte refers to a medium loud dynamic, forte indicates a loud dynamic, and fortissimo specifies an even louder dynamic than forte. Each of these terms serves to guide the performer on how to express the music's emotional and stylistic intentions, but "piano" specifically represents the soft dynamic that allows for nuanced and delicate musical passages.