| kappa | a light chain of human immunoglobulins [chain] |
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| L&A | light and accommodation; living and active |
| LASER | light amplification by stimulated emission of radiation |
| LC | Laennec cirrhosis; Langerhans cell; late clamped; large chromophobe; lecithin cholesterol acyltransf... |
| LCDD | light chain deposition disease |
| 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) |
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| 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) |
| light wire appliance | An orthodontic appliance utilizing small gauge labial wires with expansion and contraction loops formed into it and attached to bands fitted to individual teeth; sometimes called Begg light wire differential force technique. (05 Mar 2000) |