n :  a nonmetallic element that is the simplest and lightest of the elements and that is normally a colorless odorless highly flammable diatomic gas - symbol H - see DEUTERIUM TRITIUM ELEMENTtable   hy*drog*e*nous adj 
 
 
 
Similar sounding terms:  Hyd·er·gine  trag·i·on 
 
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