light water

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English[edit]

Alternative forms[edit]

Noun[edit]

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

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