thionyl

[ thahy-uh-nil ]

adjective

, Chemistry.

1. sulfinyl.

thionyl

/ ˈθaɪənɪl /

noun

1. modifier of, consisting of, or containing the divalent group SO Alsosulphinyl

   a thionyl group or radical

   thionyl chloride

Word History and Origins

Origin of thionyl¹

1870–75; < Greek theîon sulfur + -yl

Word History and Origins

Origin of thionyl¹

C19 thion-, from Greek theion sulphur + -yl