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lintel

noun
🔊/ˈlɪntl/
🔊/ˈlɪntl/
 (architecture建筑)
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  1. a piece of wood, stone, metal or concrete over a door or window that forms part of the frame（门窗的）过梁；门楣Topics Buildingsc2
    Word OriginMiddle English: from Old French, based on late Latin liminare, from Latin limen ‘threshold’.