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The Collaborative International Dictionary
Ponderosities

Ponderosity \Pon`der*os"i*ty\, n.; pl. Ponderosities. [OF. ponderosit['e].] The quality or state of being ponderous; weight; gravity; heaviness, ponderousness; as, the ponderosity of gold.
--Ray.

Wiktionary
ponderosities

n. (plural of ponderosity English)