malm noun & verb. [mɑ:m]
[Old English mealm- (in mealmstān) = Old Norse malr ore, metal, Gothic malma sand, from Germanic base also of MEAL noun¹.]
A. noun.
1. (More fully malm rock, malmstone) a soft friable rock consisting largely of chalky material; light loamy soil formed by the disintegration of this rock. OE.

2. More fully malm-brick. A fine-quality brick made orig. from malm, marl, or similar chalky clay. E19.
b. verb trans.
1. Treat (land) with malm. Only in E17.

2. Convert (clay) into artificial malm for brick-making; cover (brick earth) with artificial malm. M19.

■ malmy adjective of a loamy character L17.

[TahlilGaran] English Dictionary ▲