thionyl
Thi"on*yl, n. Etym: [Thionic + -yl.] (Chem.) Defn: The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride.
Thi"on*yl, n. Etym: [Thionic + -yl.] (Chem.) Defn: The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride.