[f. Gr. θέρμη heat + ANTIDOTE.] An antidote to heat.

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  1.  A rotating fan fixed in a window-opening and incased in wet tatties, used in India to drive in a current of cooled air. (Introduced in 1831.)

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  ‘[It] is in fact a winnowing machine fitted to a window aperture’ (Yule).

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1840.  W. G. Osborne, Crt. & Camp Runjeet Sing, 132. The thermometer at 112 all day in our tents, notwithstanding tatties, thermantidotes, and every possible invention … to lessen the stifling heat.

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1898.  P. Manson, Trop. Diseases, xii. 214. Rooms should be kept dark during the day, and cooled by means of punkahs, thermantidotes, tatties.

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  2.  Med. A cooling medicine. rare0.

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1860.  Mayne, Expos. Lex., Thermantidotum, term for a medicine…: a thermantidote.

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1890.  Billings, Med. Dict., Thermantidote, a remedy against excessive heat or fever.

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