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

• Isole Egadi
• isoleucine
• isoline
• isomer
• isomerase
• isomeric
• isomerisation
• isomerise
• isomerism
• isomerization
• isomerize
• isometric
• isometric exercise
• isometric line
• isometrical
• isometrics
• isometropia
• isometry
• isomorph
• isomorphic
• isomorphism
• isomorphous
• isomorphy
• isoniazid
• isophote