Webster's English Dictionary

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boron

Cross references:
  1. element               
 
bo.ron \'bo-(*)r-.a:n, 'bo.(*)r-\ \bo-r-'a:n-ik, bo.-'ra:n-\ n [borax + -on 
   (as in carbon)] : a trivalent metalloid element found in nature only in 
   combination and us ed in metallurgy and in nucleonics - bo.ron.ic aj