containerboard

or con·tain·er board

[kuh n-tey-ner-bawrd, -bohrd]

noun

any paperboard used in making containers, as corrugated paper or cardboard.

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Origin of containerboard

First recorded in 1920–25; container + board

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018