bergmeal

from the GNU version of the Collaborative International Dictionary of English.

• noun (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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mineralogy An earthy substance, resembling fine flour, composed of the shells of infusoria.
• noun mineralogy A white powdery variety of calcite.