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fiberboard

[fahy-ber-bawrd, -bohrd]
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noun
  1. a building material made of wood or other plant fibers compressed and cemented into rigid sheets.
  2. a sheet of this.
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Origin of fiberboard

First recorded in 1895–1900; fiber + board
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018