Dictionary![]() ![]() lime•stonePronunciation: (līm'stōn"), [key] —n. a sedimentary rock consisting predominantly of calcium carbonate, varieties of which are formed from the skeletons of marine microorganisms and coral: used as a building stone and in the manufacture of lime. Cf. marble. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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