Source : Webster's Revised Unabridged Dictionary (1913)

Precipitance \Pre*cip"i*tance\, Precipitancy \Pre*cip"i*tan*cy\,
   n. [From {Precipitant}.]
   The quality or state of being precipitant, or precipitate;
   headlong hurry; excessive or rash haste in resolving, forming
   an opinion, or executing a purpose; precipitation; as, the
   precipitancy of youth. ``Precipitance of judgment.'' --I.
   Watts.

Source : WordNet®

precipitance
     n : the quality of happening with headlong haste or without
         warning [syn: {abruptness}, {precipitateness}, {precipitancy},
          {suddenness}]