ˌōn noun suffix
( -s )
Etymology: International Scientific Vocabulary, from Greek -ōnē (feminine patronymic suffix)
1. : ketone or oxo compound not a true ketone — in names of specific organic compounds
acet one
pentan one
5-pyrazol one
2. : chemical compound containing oxygen especially in a carbonyl or analogous group (as sulfonyl) — in names of classes of compounds
ket one
lact one
sulf one
3. : -on I