fiberboard

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fiberboard (US) noun
or British fibreboard /ˈfaɪbɚˌboɚd/
fiberboard (US)
noun
or British fibreboard /ˈfaɪbɚˌboɚd/
Learner's definition of FIBERBOARD
[noncount]
: a type of board made by pressing fibers of wood into stiff sheets