light water (uncountable)
- (chemistry) water in its standard form of H2O, containing two protium hydrogen atoms, as opposed to heavy water.
- 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