Dictionary

turncap en · NOUN

Meanings

1. A sort of chimney cap which turns round with the wind so as to present its opening to the leeward.
   • a building furnished with cowls, or turncaps, with their vanes so arranged, that, while one shall receive the full force of the wind, the other may allow it to escape freely 1846, Morrill Wyman, A Practical Treatise on Ventilation:

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