a porous stone used to filter water; any of various types of stone used for this purpose.
| 单词 | θ61364 |
| 释义 | the world > physical sensation > cleanness and dirtiness > freedom from impurities > removal of impurities > filtering or percolating > [noun] > filter or percolator > stone (2) filtering stone1745 a porous stone used to filter water; any of various types of stone used for this purpose. dripstone1792 ‘The name usually given to filters composed of porous stone’ (Smyth Sailor's Word-bk. 1867). |
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