Obs. [f. L. effervent-em, pr. pple. of effervĕre to boil up or over: see -ENCY.] The condition of being overheated, of issuing forth in a heated state.
1670. E. R., Animadv. Glanvills Ne Plus Ultra, 105. Effervency of that [blood] in the Heart.
1670. J. Claridge, Sheph. Banburys Rules (1744), 33. When they [fulminating Matter] are burst forth and floating in the Air, they [cold winds] hinder their Effervency [in thunderstorms].
1681. [see EFFERVESCENCY].