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

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

DACTYL
A 3-syllable word consisting ofBeat/Off-beat/Off-beat(Ex- "yesterday"). seeScansion

DIAD
A 2-note chord, occasionally only the notes of theFRAME(theCOMMON TONEand thePROPER TONE), but more frequently thePROPER TONE(tripled) and theMEDIAN

DIAGRAMS
Used in Harmony to illustrate chordal and voice-leading relationships (in the Window and in Jordan Triangles)

DIATONIC SYSTEM
The seven adjacent notes in the Series of Fifths bounded by theWindow. All notes ouside of the Window are considered Chromatic

DIMENSIONS
for definitions of the 6 Dimensions, seeWorlds

DIMINISHED
Tr- Smaller, seeInterval

DIMINUTION
Aformof Chromaticism (a Transformation in Harmony) in whichOrbit 1andOrbit 3are chromaticized to bring them closer to their resolution

DIRECTION (OF RESOLUTION)
The direction (either flattening, "downward", or sharpening, "upward"), in which one chord resolves to the next.

DIVISION
A generativeprocedure in Melo-rhythm in which note-values are divided, producing the next-smaller rhythmic level.

• The only strong Tetrad in a diatonic system (written "DOMINANT", placed, in the Window, above the TONIC in diatonic major, and below the TONIC in diatonic minor).
• ATetradwhich produces a strong resolution (with an augmented fourth between its Secondary Notes, theMEDIANand theMOTRIX).
• Tr- Degree V of the diatonic scale, in diatonic major or in chromatic minor.
• Tr- The chord (Triad or Tetrad) built on this degree (V).

DOMINANTIZATION
The principalformof Chromaticism (a Transformation in Harmony), in which either theMEDIANor theMOTRIXis chromaticized to give weak chords dominant strength

DOT
1. A sign placed after a note-value creating a dotted-note. 2. An abbreviation of the the term "dotted rhythm" used to designate a 2-note rhythm in which the first note is dotted and the second is half-length, the opposite of asnap.

DOTTED-NOTE
50% longer duration than the original note. seeNote-values

DURATION
QuantitativeDimensionin the World of Time (measured with note-values)

DYNAMICS
Energy (ie. Volume) accentuation of a performance, in Time, a specific aspect ofOrchestration.