abbreviations
"Tr" - a traditional, usually academic definition or symbol
"Ex-" - example

ABCDEFGHIJKLMNOPQRSTUVWXYZ

h
Abbreviation for a . see Note-values

H
Abbreviation for a .

HALF-NOTE
see Note-values

HARMONICS (NATURAL)
see Natural Harmonics

HARMONIC STAFF
A 2-line staff, in the dimension of Chrominicism, used to represent Harmony and the position of its Harmonic Functions.

HARMONY
The simultaneous, vertical structure of sound, based on intervals of the simplest ratio, octave, perfect fifth and major third. One of the 3 structures of Music, it is, with Rhythm, more fundamental than Melody, which evolves from its Voice-leading.