malm
/mɑːm
/noun [mass noun]
1A soft, crumbly chalky rock, or the fertile loamy soil produced as it weathers.
1.1 (also malm brick) [count noun] A fine-quality brick made originally from malm, marl, or a similar chalky clay.I also heard about adding mineral rocks (malm brick) and brownite....
- I am thinking about bringing up the walls with lime malm brick.
Origin
Old English mealm-, of Germanic origin; related to meal2.