noun Chemistry.
- a sugar containing the aldehyde group or its hemiacetal equivalent.
noun
- a sugar that contains the aldehyde group or is a hemiacetal
n.
- Any of a class of monosaccharide sugars containing an aldehyde group.
- Any of a class of simple sugars (monosaccharides) containing an aldehyde group (CHO). Galactose, glucose, and ribose are all aldoses. Compare ketose.