Words: fricativeness
Part of speech: n
Definition: (phonetics) The quality of being produced by air flowing through a constriction in the oral cavity and typically producing a sibilant, hissing, or buzzing quality, as the English /f/ and /s/.
Example: For the former, the fricativeness of the breath is audible from the throat, through the oral configuration; for the latter, the breath-friction is audible only from the lip.