1. Ore that yields a substantial profit to the miner 
2. A profitable success
   "the inventor worked for years before hitting pay dirt"

Type of: ore, success

• octennial
• octet
• octette
• octillion
• octo-
• October
• October 12
• October 24
• October Revolution
• Octoberfest
• octodecimo
• octogamy
• octogenarian
• octonary
• octopod
• Octopoda
• Octopodidae
• octopus
• octoroon
• octosyllabic
• octosyllable
• octroi
• octuple
• octuplet
• octyl