| LLQ | left lower quadrant; low-level question |
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| LOC | laxative of choice; level of consciousness; liquid organic compound; locus of control; loss of consc... |
| LOI | level of incompetence; limit of impurities |
| Lp | lipoprotein; sound pressure level |
| L1TC | level 1 trauma center |
| free energy | A thermodynamic term used to describe the energy that may be extracted from a system at constant temperature and pressure. In biological systems the most important relationship is: _G = RTln(Keq), where Keq is an equilibrium constant. (18 Nov 1997) |
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| fusion energy | <chemistry, radiobiology> The binding energy of a nucleus is the minimum energy required to dissociate it into its component neutrons and protons. Neutron or proton binding energies are those required to remove a neutron or proton, respectively, from a nucleus. Electron binding energy is that required to remove an electron from an atom or a molecule. (16 Dec 1997) |
| linear energy transfer | <radiobiology> Average amount of energy lost per unit of particle track length and expressed in keV um-1. Acronym: LET (16 Dec 1997) |