mother lode

☆

the main lode, or vein of ore, in a particular region or district

See mother lode in American Heritage Dictionary 4

noun

The main vein of ore in a region.
An abundant or rich source: “the kind . . . who makes Boston the mother lode of advance men” (David Nyhan).

Learn more about mother lode

mother lode in a sentence

link/cite print suggestion box

More from YD