D defs.my
Entry 1 sense Webster, 1913

Shiver-spar

· Shiv·er-spar · IPA
01 n. A variety of calcite, so called from its slaty structure; -- called also slate spar.
  1. 1.
    A variety of calcite, so called from its slaty structure; -- called also slate spar.(Min.) Also: slate spar