physical law;  laws of physics
 law-like nature;  regularity
 law of nature;  natural law
 law of conservation of mass
 law of conservation of energy
 Murphy's Law ("Whatever can go wrong, will go wrong")
 Mendel's laws (of genetic inheritance)
 (Fleming's) left-hand rule
 second law of thermodynamics
 second law of thermodynamics
 Charles' law;  Charles's law
 Fleming's rules (Fleming's left-hand rule and Fleming's right-hand rule)
 action-reaction law;  Newton's third law of motion
 law of thermodynamics;  laws of thermodynamics
 Pareto principle;  Pareto's law;  80-20 rule
 (Fleming's) right-hand rule
 law of conservation of momentum
 (Mendel's) law of dominance
 law of thermodynamics;  laws of thermodynamics
 first law of thermodynamics
 (Mendel's) law of segregation
 (Mendel's) law of independent assortment
 law of conservation of angular momentum
 Kirchhoff's law;  Kirchhoff's laws
 Gresham's Law ("when there is a legal tender currency, bad money drives good money out of circulation")
 third law of thermodynamics
 law of multiple proportions
 law of multiple proportions
 first law of thermodynamics
 law of diminishing marginal utility
 law of equimarginal utility
 law of diminishing returns;  law of diminishing marginal returns
 law of diminishing marginal product
 zeroth law of thermodynamics
 (Mendel's) law of dominance
 law of definite proportions
 law of equilibrium (Le Chatelier's principle)
 law of quadratic reciprocity
 third law of thermodynamics
 law of superposition;  principle of superposition