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reflection ,  (less commonly) reflexion 
  n 
1 the act of reflecting or the state of being reflected 
2 something reflected or the image so produced, as by a mirror 
3 careful or long consideration or thought 
4 implicit or explicit attribution of discredit or blame 
5  (Maths) a transformation in which the direction of one axis is reversed or changes the polarity of one of the variables 
6  (Anatomy) the bending back of a structure or part upon itself 
♦  reflectional, reflexional  adj 

angle of reflection 
  n the angle that a beam of reflected radiation makes with the normal to a surface at the point of reflection 
nonspecular reflection 
  n  (Physics) the diffuse reflection of sound or light waves 
reflection density 
  n  (Physics) a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance., (Symbol)  D  (Former name)  optical density 
total internal reflection 
  n  (Physics) the complete reflection of a light ray at the boundary of two media, when the ray is in the medium with greater refractive index 



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