ketones

https://doi.org/10.1351/goldbook.K03386
Compounds in which a carbonyl group is bonded to two carbon atoms $\ce{R2C=O}$ (neither $\ce{R}$ may be $\ce{H}$).
Note: Compounds of structure such as $\ce{R3SiC(=O)R}$ are not ketones but acyl derivatives of substituted silanes.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1346 [Terms] [Paper]