GNU Collaborative International Dictionary of English

Found one definition

1.       
   Carbohydrate , n. [Carbon + hydrate.] (Physiol. Chem.) One of a group of compounds including the sugars, starches, and gums, which contain six (or some multiple of six) carbon atoms, united with a variable number of hydrogen and oxygen atoms, but with the two latter always in proportion as to form water; as dextrose, C6H12O6.
   1913 Webster