Obs. [ad. L. æstuārium (prop. adj. = tidal) a tidal opening, also a vent-hole for vapors. The L. form is also found unchanged.]

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  1.  = ESTUARY.

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1706.  Phillips, Æstuary, a Place overflow’d with Sea-water, such as the Washes and Fens in Lincolnshire.

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1787.  T. Best, Angling (ed. 2), 129. The Humber … is rather the mouth or æstuarium of divers rivers meeting together.

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  2.  A vapor-bath.

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1706.  Phillips, Æstuary, in a Medicinal Sense, a receiving of the Vapours or Steam of certain boiled Drugs into the Body, thro’ a hole made in a Seat or Chair.

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1775.  Ash, Æstuarium, in pharmacy, a vapor-bath.

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