Webster's English Dictionary

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asphalt

as.phalt or as.phal.tum \'as-.fo.lt\ \as-'fo.l-t*m\ \as-'fo.l-tik\ n [ME 
   aspalt, fr. LL aspaltus, fr. Gk asphaltos] 1: a brown to black bituminous 
   substance that is found in natural beds and is also obtained as a residue 
   in petroleum or coal-tar refining and consists chiefly of hydrocarbons 2: 
   an asphaltic composition used for pavements and as a waterproof cement  - 
   as.phal.tic aj