carbohydrate (n.)youdaoicibaDictYouDict
1851, from carbo-, comb. form of carbon, + hydrate (n.), denoting compound produced when certain substances combine with water, from Greek hydor "water" (see water (n.1)).
The name carbohydrate was given to these compounds because, in composition, they are apparently hydrates of carbon. In structure, however, they are far more complex. [Flood]
carburetor (n.)youdaoicibaDictYouDict
device to enhance a gas flame, 1866, from carburet "compound of carbon and another substance" (1795, now displaced by carbide), also used as a verb, "to combine with carbon" (1802); from carb-, comb. form of carbon, + -uret, an archaic suffix formed from Modern Latin -uretum to parallel French words in -ure. Motor vehicle sense is from 1896.