Glucose

Part of speech: noun

Pronunciation: /ˈɡluː.kəʊz/

Definitions

1. A simple sugar that serves as the primary source of energy for cells in living organisms
2. A monosaccharide that is a crucial energy source for metabolic processes in organisms and a fundamental building block for more complex carbohydrates
3. A simple carbohydrate that acts as a key energy provider for cellular functions in living beings and is essential for various biochemical reactions

Etymology: The sugar that fuels your cells got its name from wine. The ancient Greek word "gleûkos" meant sweet wine, or fresh must (grape juice before fermentation), and it was the source of the modern name. Because grapes are rich in this sugar, the Greek word captured the sweetness of the drink rather than the sugar as a chemical substance, which was not understood until much later. When French chemists needed a name for the sugar in the nineteenth century, they borrowed the Greek root and gave it the form "glucose," with the suffix "-ose" that chemists attached to sugar names. The suffix was itself later abstracted from this very word, so "glucose" helped establish the pattern that names other sugars such as "fructose" and "lactose." English adopted the French term, and it has kept the Greek sense of sweetness at its core.