A jazz sus chord or dominant 9sus4 chord is a seventh chord on the fifth scale degree of the key with a suspended fourth and an added ninth. Functionally, it can be written as V9sus4 or V7sus9.
ISO (International Organization for Standardization) is an independent, non-governmental membership organization and the world's largest developer of voluntary International Standards.
iso-. a combining form meaning âequalâ: isochromatic; in chemistry, used in the names of substances that are isomeric with the substance denoted by the base word: isocyanic acid.