A term used differently by different authorities; -- by
   some as equivalent to fricative, -- that is, as including all the
   continuous consonants, except the nasals m, n, ng; with the further
   exception, by others, of the liquids r, l, and the semivowels w, y; by
   others limited to f, v, th surd and sonant, and the sound of German ch,
   -- thus excluding the sibilants, as well as the nasals, liquids, and
   semivowels. See Guide to Pronunciation, // 197-208.