A compound formed by the combination of carbon and oxygen, or a generic term for carbon-oxygen compounds.
From carbo- (carbon) + oxide (from French oxyde, a compound with oxygen). This appears to be an older or less common term for what would now be called a carbonyl or carboxylic compound.
Carboxide is a word that represents how chemistry terminology has consolidated—modern chemists would use more specific terms like carbonyl or carboxylic acid instead. It's a linguistic reminder that science becomes more precise as it matures.
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