Hardness

From DictionGloss

Jump to: navigation, search

Hardness is the resistance of a mineral to abrasion or scratching.

A water-quality indication of the concentration of alkaline salts in water, mainly calcium and magnesium. If the water you use is "hard" then more soap, detergent or shampoo is necessary to raise a lather.

Retrieved from "http://www.dictiongloss.com/Hardness"