Aldehyde

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Aldehyde

(Science: chemistry) a carbon atom double-bonded to an oxygen, single-bonded to a hydrogen, and single-bonded to another chemical group (such as methane, benzene, another hydrogen, anything).

The carbon oxygen double bond part is known as a carbonyl group (C=O). An example is acetaldehyde, which is a carbonyl group single-bonded to a hydrogen and single-bonded to a methane (a methyl group: CH3).