noun One of two parts, equal or unequal, in which a whole tone is divided. The semitone in 12-tone equal temperament, with frequency ratio of the twelfth root of two.
noun The semitone in 12-tone equal temperament, with frequency ratio of the twelfth root of two.
noun Any of the pitches of a chromatic scale.
noun An interval equal to an augmented unison or a minor second, depending on the context and tuning system used.