| fresh water | 1. Water containing no significant amounts of salts, such as rivers and lakes. 2. Of, pertaining to, or living in, water not salt; as, fresh-water geological deposits; a fresh water fish; fresh water mussels. 3. Accustomed to sail on fresh water only; unskilled as a seaman; as, a fresh water sailor. 4. Unskilled; raw. Fresh water soldiers. Source: Websters Dictionary (01 Mar 1998) |
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| light water | <radiobiology> Ordinary H2O, as opposed to heavy water, which contains atoms of the heavier isotopes of hydrogen, deuterium and/or tritium. See: hydrogen, isotope, deuterium, tritium, heavy water. (09 Oct 1997) |
| light-water reactor | <radiobiology> Class of fission reactors using ordinary light water as a coolant, rather than liquid metal or heavy water (water with deuterium instead of hydrogen). (09 Oct 1997) |
| lime water | Calcium hydroxide solution; a saturated solution prepared by mixing 3 g of calcium hydroxide in a liter of purified cool water. Undissolved calcium hydroxide is allowed to precipitate and the solution is dispensed without agitation; lime water is a common ingredient in lotions and is used internally extensively in veterinary medicine. (05 Mar 2000) |
| littoral water | Shallow water, to 30 feet, near the shore of deep lakes. (09 Oct 1997) |