mundic

English

Noun

mundic (plural mundics)

(mining, UK, dialect, Cornwall) iron pyrite or arsenic pyrite
- 1870, Oliver Byrne, Ernest Spon, Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval:
  The ores and minerals to be treated according to my invention are those containing sulphur, particularly mundics, or iron pyrites, copper ores, lead ores, tin ores, zinc ores […]

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “mundic”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)