Definition of aldopentose
: a pentose with an aldehyde functional group attached to the first carbon atom : a pentose (such as ribose or arabinose) of an aldehyde nature It is a naturally occurring monosaccharide with a carbonyl group located at the end of its 5-carbon chain, making it an aldehyde derivative, or an aldopentose. — Paula Frank, Prepared Foods, 1 June 2006
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