carbohydrate
‘the general name for a group of organic compounds consists of carbon atoms in multiples of 6 and hydrogen and oxygen in the proportion of water’
Lexical development traced from the Tamil root:
carbo- ‘carbon’ + hydrate < F. hydrate ‘compound of water and another chemical’ < Gk. hydr- < hydor ‘water’ + -ate < haid < wed- < Tamil utakam