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1. Any of a class of organic compounds, such as acetone, characterized by having a carbonyl group in which the carbon atom is bonded to two other hydrocarbon groups and having the general formula R(CO)R′, where R may be the same as R′.

[German Keton, shortening and alteration of Aceton, acetone : Latin acētum, vinegar; see acetum + German -on, n. suff. (alteration of -en, from Greek -ēnē).]

ke·ton′ic (-tŏn′ĭk) adj.
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1 eV, (4) phenolic (aromatic C connected to O group (COH) in phenols) and ketonic C (carbonyl substituted aromatic structures of quinones, phenols and ketones) at 286.
These algae also contain some minor carotenoids among which canthaxanthin and astaxanthin, both with ketonic groups; stand out (Whittle and Casselton, 1975; Karlson et al.
Formation of yellow-orange coloration indicates the presence of a ketonic terpenoids.
It was observed that the sample is composed of the alcohols, amines and ketonic compounds.
Nalmefene has a methylene radical (C=CH2) substituted by a ketonic group (C=O) in position 6 with respect to naltrexone, and in comparison with naltrexone it has greater bioavailability (40-50%), a longer half life and greater affinity for delta and kappa opioid receptors.
Tenders are invited for Supply of led with pole brand ketonic at adai tal khalapur dist raigad
20 suggested that the C-3 in compound (4) was ketonic rather than alcoholic.
The presence of OH COOH or ketonic group and a double bond in these fractions were liable to be reacted with the cell membrane and cellular contents of both superficial and deeper layers of epidermis causing irritancy.
This category featured a furan ring at C-14, 15, 16 positions and a ketonic group at C-1 or C-3 position.
Johnson, "Metabolism of ketonic acids in animal tissues," The Biochemical Journal, vol.
Bjorkhem (35) also reported that at least a small fraction of fatty acids may be subject to primary [omega]-oxidation prior to [beta]-oxidation in the ketonic state.
They probably form the more stable ketonic and aldehydic groups, by the migration of the low-molecular mass oxidized material, e.