Also means
lightweight volcanic building block
Usage Note
Bimsstein refers both to the natural volcanic rock used for abrasion and to lightweight hollow masonry blocks (Bimssteine) made from pumice aggregate, widely used in German residential construction for walls.
Examples
"Die Außenwände des alten Hauses bestehen aus Bimsstein."
Natural Translation
The exterior walls of the old house are made of pumice block.
Literal Translation
The outer walls of the old house consist of pumice stone.

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