Dictionary
lime•stone
Pronunciation: (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.