English

Alternative forms

• lightwater
• light-water

Noun

light water ‎(uncountable)

1. (chemistry) Water in its standard form of H₂O, containing two protium hydrogen atoms, as opposed to heavy water.
2. Foam formed by water and a fluorocarbon surfactant, used in firefighting because it floats on flammable liquids lighter than water.
   • 2001, Roger C. Mardon, An Illustrated History of Fire Engines, ISBN 0711024839, page 112:

     The light water (AFFF) of the TACR was to be backed up by fluorinated protein ioam instead ot standard protein foam.

   • 2014, John R. Ridley, Safety at Work, ISBN 1483193748, page 504:

     These fires can be extinguished with water spray, alcohol-resistant foam, light water, vaporising liquids ("Halons'), carbon dioxide and dry powder.

   • 2015, Phil Hughes & Ed Ferrett, Introduction to Health and Safety at Work, ISBN 1317935098:

     They can be extinguished by carbon dioxide, dry powder, water spray, light water and vaporising liquid

See also

• heavy water
• semi-heavy water

Anagrams

• leatwright