holystone
n.
soft sandstone used to scrub decks of sailing ships, 1777, despite the spelling, so called perhaps because it is full of holes. As a verb, by 1828.
| 词汇 | holystone | 
| 词根词缀 | Online Etymology Dictionary holystone n. soft sandstone used to scrub decks of sailing ships, 1777, despite the spelling, so called perhaps because it is full of holes. As a verb, by 1828. | 
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