Do you really want to send Webster 1913 a message saying you like their work?
Cal*ca"re*ous (?), a. [L. calcarius pertaining to lime. See Calx.]
Partaking of the nature of calcite or calcium carbonate; consisting of, or containg, calcium carbonate or carbonate of lime.
Calcareous spar. See as Calcite.
© Webster 1913.