white efflorescence which forms on new or damp walls, caused by saltpetre working through to the surface.
| 单词 | θ62021 |
| 释义 | the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > [noun] > specific impurities > incrustation > on brick (3) saltpetre rot1848 white efflorescence which forms on new or damp walls, caused by saltpetre working through to the surface. whitewashing1884 Efflorescence of salts on the surface of bricks, resulting in a white coating. Cf. whitewash, v. 5. Now rare. saltpetreing1885 the formation of saltpetre rot. |
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