Noun
a monosaccharide sugar having six carbon atoms and an aldehyde group
Source: WordNetFor example, there are 16 distinct aldohexose stereoisomers, but the name "glucose" means a specific pair of mirror-image aldohexoses. Source: Internet
Ketoses of biological interest usually have the carbonyl at position 2. The various classifications above can be combined, resulting in names such as "aldohexose" and "ketotriose". Source: Internet