n.1.(Min.) An earthy substance, resembling fine flour. It is composed of the shells of infusoria, and in Lapland and Sweden is sometimes eaten, mixed with flour or ground birch bark, in times of scarcity. This name is also given to a white powdery variety of calcite.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Raw mixes, consisting for 80-85% of low-magnesian carbonate breeds, for 15-17% from clays and a small amount of pozzolon (molding box, bergmeal, diatomite), are used for production of cement [4].