D defs.my
Entry 1 sense Webster, 1913

Gieseckite

· Gie·seck·ite · IPA
01 n. A mineral occurring in greenish gray six-sided prisms, having a greasy luster. It is probably a pseudomorph after elæolite.
  1. 1.
    A mineral occurring in greenish gray six-sided prisms, having a greasy luster. It is probably a pseudomorph after elæolite.(Min.)