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.

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1670.  E. R., Animadv. Glanvill’s Ne Plus Ultra, 105. Effervency of that [blood] in the Heart.

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1670.  J. Claridge, Sheph. Banbury’s Rules (1744), 33. When they [fulminating Matter] are burst forth and floating in the Air, they [cold winds] hinder their Effervency [in thunderstorms].

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1681.  [see EFFERVESCENCY].

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