diastolic
- a of or relating to a diastole or happening during a diastole
diatomic
- a of or relating to a molecule made up of two atoms
a diatomic molecule
diatonic
- a based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals
- s based on or using the five tones and two semitones of the major or minor scales of western music