1. plural of motherlode; a principal vein of ore or mineral deposit, especially one that is rich and productive
Usage: mining/geology term; often used figuratively
2. plural of motherlode; a source of great wealth, success, or valuable resources
Usage: figurative use; informal

Examples

• The miners discovered several motherlodes of silver in the mountain range.
• That antique shop turned out to be a motherlode of rare collectibles.
• The company found motherlodes of data that helped improve their products.
• Historians consider those archives a motherlode of information about the era.
• The estate sale proved to be a motherlode for vintage furniture dealers.
• Geologists identified multiple motherlodes of copper in the region.