S0259100 (sĕm′ē-tōn′, sĕm′ī-)n.Music An interval equal to a half tone in the standard diatonic scale. Also called half step, halftone.sem′i·to′nal adj.sem′i·to′nal·ly adv.
semitonal
(ˈsɛmɪˌtəʊnəl) adj another word for semitonicEncyclopediaSeesemitone