backerboard
The English word “backerboard” has 3 meanings listed here.
noun
- Boards used as underlayment for tile, plaster, or other materials.
- A sacrificial board placed behind or under a board being drilled or sawn, so as to prevent blowouts. (Usually scrap ends reused for such purpose.)
- Sheets of cardboard or similar material used to preserve or display books, magazines, art prints, etc.
Etymology
From backer + board.
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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.