limestone

From lime +‎ stone.

limestone (countable and uncountable, plural limestones)

1. An abundant rock of marine and fresh-water sediments; primarily composed of calcite (CaCO₃); it occurs in a variety of forms, both crystalline and amorphous.

• lime
• calcium carbonate

• (mineralogy): bluestone, burrstone, calp, coquina, coral rag, chalk, malm, marble, travertine, tufa

limestone (not comparable)

1. Made of or with limestone.
   • 1907, Robert William Chambers, chapter I, in The Younger Set, New York, N.Y.: D. Appleton & Company, OCLC 24962326:

     The house was a big elaborate limestone affair, evidently new. Winter sunshine sparkled on lace-hung casement, on glass marquise, and the burnished bronze foliations of grille and door.

• karst

• lemoniest, milestone