nitrocalcite

from The Century Dictionary.

• noun Native nitrate of calcium.

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

• noun (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.

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

• noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the mineral form of calcium nitrate