holystone

holystone
[ˈhəʊlɪstəʊn]
(chiefly historical)(主史)
noun
  1. a piece of soft sandstone used for scouring the decks of ships
    （擦洗甲板的）甲板磨石
verb
  1. [with obj.]scour (a deck) with a holystone
    用甲板磨石擦洗（甲板）
语源
  1. early 19th cent.: probably from holy + stone. Sailors called the stones ‘bibles’ or ‘prayer books’, perhaps because they scrubbed the decks on their knees
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