The Collaborative International Dictionary
Carboxide
Carboxide \Car*box"ide\, n. [Carbon + oxide.] (Chem.) A compound of carbon and oxygen, as carbonyl, with some element or radical; as, potassium carboxide.
Potassium carboxide, a grayish explosive crystalline compound, C6O6K, obtained by passing carbon monoxide over heated potassium.
Wiktionary
carboxide
n. (context organic compound English) A compound of carbon and oxygen, such as carbonyl, with some element or radical.