English
thione
From thio- + -one.
Formed from thio + one
Proto-Indo-European *h₁óynos ‘single’
Proto-Germanic *ainaz ‘one’
Proto-West Germanic *ain ‘one’
Old English ān ‘one’
Middle English oon
English one
Today it means
noun A ketone-like compound in which the oxygen is replaced by sulfur, having the general formula R₂C=S
Language periods are conventional ranges, not dates for this word.
Etymograph / thione