diameter definition, diameter meaning | English dictionary

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diameter

  

      n  
1   
a    a straight line connecting the centre of a geometric figure, esp. a circle or sphere, with two points on the perimeter or surface  
b    the length of such a line  
2    the thickness of something, esp. with circular cross section  
     (C14: from Medieval Latin diametrus, variant of Latin diametros, from Greek: diameter, diagonal, from dia- + metron measure)  
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