foamboard

Etymology

From foam + board.

foamboard means 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. Lexicurio rates it Sui generis — a strength score of 90 out of 100.

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.