oxocarbons

https://doi.org/10.1351/goldbook.O04375
Compounds consisting wholly of carbon and oxygen, e.g. $\ce{CO}$, $\ce{O=C=O}$, $\ce{O=C=C=C=O}$,
molecule
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1355 [Terms] [Paper]