Final answer:
Neumes are marks indicating the contour of a chant melody in Gregorian chant notation.
Step-by-step explanation:
Neumes are marks indicating the contour of a chant melody in Gregorian chant notation. They were developed in the medieval period as a way to notate music. Neumes provide a general representation of the pitch and rhythm of the chant, but they do not denote specific note values or durations.
Learn more about Neumes in Gregorian chant