nitrocalcite

Century Dictionary and Cyclopedia

1. n. Native nitrate of calcium. It occurs as a pulverulent efflorescence on old walls and limestone rocks, has a sharp bitter taste, and is of a grayishwhite color.

Wiktionary

1. n. mineralogy A hydrated calcium nitrate mineral that forms as an efflorescence where manure contacts concrete or limestone in a dry environment, as in stables or caverns.

GNU Webster's 1913

1. n. (Min.) Nitrate of calcium, a substance having a grayish white color, occuring in efflorescences on old walls, and in limestone caves, especially where there exists decaying animal matter.

WordNet 3.0

1. n. the mineral form of calcium nitrate