chimney cap
noun1
A device to improve the draught of a chimney, by presenting an exit aperture always to leeward.
2
Any covering for a chimney
noun — 2 senses
A device to improve the draught of a chimney, by presenting an exit aperture always to leeward.
Any covering for a chimney
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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