Spirant

Webster's Dictionary of the English Language

·noun 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.