Aldose

noun

1. Any of a class of monosaccharide sugars containing an aldehyde group.
2. A name given to any monosaccharide which is an aldehyde to distinguish it from a ketose, which contams a ketone-group.
3. Any of a class of monosaccharides having an aldehyde or hemiacetal functional group.
4. a monosaccharide sugar that contains the aldehyde group or is hemiacetal