ORIGIN: from di- 2 + -one .
-di·one
\ˈdīˌōn\ noun suffix
(-s)
Etymology: International Scientific Vocabulary di- + -one
: chemical compound containing two carbonyl groups — in names of diketones or di-oxo compounds that are not true diketones
< butanedione >
< 2,6-piperidine-dione >
< butanedione >
< 2,6-piperidine-dione >