Linguistics. pertaining to or noting features of speech, as stress, pitch, and length, that accompany individual consonants and vowels and may extend over more than one such segmental element; pertaining to junctural and prosodic features.
Part one deals with phonology, including segmental and suprasegmental features.
British Dictionary definitions for suprasegmental
(linguistics) denoting those features of a sound or sequence of sounds that accompany rather than form part of the consecutive segments of a word or sentence, as for example stress and pitch in English