资料来源 : Webster's Revised Unabridged Dictionary (1913)

Ponderousness \Pon"der*ous*ness\, n.
   The quality or state of being ponderous; ponderosity.

资料来源 : WordNet®

ponderousness
     n : the property of being large in mass [syn: {heft}, {heftiness},
          {massiveness}, {ponderosity}]