foamboard

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noun

A strong, lightweight material consisting of an inner layer of polystyrene clad with outer facing of either white clay-coated paper or brown kraft paper.

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Meanings

nounfoamboard (countable and uncountable, plural foamboards)

plural foamboards

  1. countableuncountableA strong, lightweight material consisting of an inner layer of polystyrene clad with outer facing of either white clay-coated paper or brown kraft paper.

Origin

From foam + board.

Full word history & related roots →
Cite this entry
APA

foamboard. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/foamboard

MLA

“foamboard.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/foamboard. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “foamboard,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/foamboard.

Source: foamboard on Wiktionary, CC BY-SA 4.0.