from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A variety of calcite that contains some lead carbonate.
from The Century Dictionary and Cyclopedia
- n. A variety of calcite containing a small percentage of lead carbonate.
plumbo- + calcite (Wiktionary)
When the elements named are present in large amount we have the varieties dolomitic calcite, baricalcite, strontianocalcite, ferrocalcite, manganocalcite, zincocalcite and plumbocalcite, respectively.