We found 6 dictionaries that define the word water hardness:

General (2 matching dictionaries)

1. water hardness: Wiktionary
2. Water Hardness, Water hardness: Wikipedia, the Free Encyclopedia

Business (1 matching dictionary)

3. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

4. Water hardness: Encyclopedia

Medicine (1 matching dictionary)

5. Water hardness: Medical dictionary

Science (1 matching dictionary)

6. General Chemistry Online (No longer online)

Definitions from Wiktionary (water hardness) ▸ noun:  (inorganic chemistry) The level of dissolved calcium salts in water Similar: total hardness, hardness, hard water, hardwater, soft water, calcium hydroxide, water glass, calcide, hydrophilite, alkali, more... Opposite: water softness, low mineral content, low hardness ▸ Words similar to water hardness ▸ Usage examples for water hardness ▸ Idioms related to water hardness ▸ Wikipedia articles (New!) ▸ Words that often appear near water hardness ▸ Rhymes of water hardness ▸ Invented words related to water hardness