# foamboard

> English word · Noun

## Definitions
1. 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.

## Etymology
From foam + board.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/foamboard