1. A brownish iron sulphide mineral (FeS) having weak magnetic properties
   - pyrrhotite, magnetic pyrites

Derived forms: pyrrhotines

Type of: mineral

• Great Salt Desert
• Great Salt Lake
• Great Sandy Desert
• great saphenous vein
• Great Schism
• great seal
• Great Seal of the United States
• great skua
• Great Slave Lake
• Great Smoky Mountains
• Great Smoky Mountains National Park
• great snipe
• great Solomon's-seal
• great St John's wort
• great toe
• Great Victoria Desert
• Great Wall
• Great Wall of China
• Great War
• great white heron
• great white hope
• great white shark
• Great White Way
• Great Yarmouth
• great year