malm
/mɑːm/noun
mass noun
1- a soft, crumbly chalky rock, or the fertile loamy soil produced as it weathers泥灰岩; 白垩土。
1.1
- （亦作malm brick）[count noun] a fine-quality brick made originally from malm, marl, or a similar chalky clay白垩砖, 灰砂砖。
词源
Old English mealm-, of Germanic origin; related to MEAL2.