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differentiate
differentiated product
differentiation
differing
difficult
difficulty
diffident
diffract
diffraction
diffraction grating
diffraction ring
diffractometer
diffuse (1)
diffuse (2)
diffuser
diffusion
diffusion pump
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diffraction
dif·frac·tion [ di frákshən ]


noun 
Definition:
 
bending of waves: the bending or spreading out of waves, e.g. of sound or light, as they pass around the edge of an obstacle or through a narrow aperture
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