hydro
n. uncountablen. electricity that is made using the power of moving water. In some places, people also use this word to talk about their electricity bill or the company that provides it.
n. hydroelectric power or the electricity supply generated from water resources. In Canadian and some American dialects, it serves as a synonym for the general electrical utility or the monthly bill itself.
I need to pay the hydro bill before Friday.
The province generates most of its energy from hydro, using several large dams located in the northern regions.
Heavy rainfall during the autumn months significantly boosted the reservoir levels, allowing the utility to export surplus hydro to neighboring states at a premium price.
From the prefix hydro-, from Ancient Greek ὕδωρ (húdōr, “water”). By surface analysis, hydr- (“water”) + -o-. The Canadian "electricity" sense is owing to hydroelectricity being the prevalent source of electricity in much of Canada and many electric companies having the word Hydro in their names.
Primarily used in Canadian English and certain regions of the United States to refer to the general power supply.