sulfonium

[ suhl-foh-nee-uh m ]
/ sʌlˈfoʊ ni əm /

noun Chemistry.

the positively charged group H3S+, its salts, or their substitute products.

Origin of sulfonium

First recorded in 1890–95; sulf(ur) + (amm)onium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019