fugacity Meaning, Definition & Usage

  1. noun the tendency of a gas to expand or escape
  2. noun the lack of enduring qualities (used chiefly of plant parts)
    fugaciousness.

WordNet

Fu*gac"i*ty adjective
Etymology
L fugacitas: cf. F. fugacité.
Definitions
  1. The quality of being fugacious; fugaclousness; volatility; as, fugacity of spirits. Boyle.
  2. Uncertainty; instability. Johnson.

Webster 1913