Last Updated：2025/11/21

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(geology) A large or rich vein of gold or of another precious mineral from which other branches extend. / (idiomatic, by extension) Any source of valuable or useful material.

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mother lode

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Source Word

mother lode

Noun

broadly idiomatic

(geology) A large or rich vein of gold or of another precious mineral from which other branches extend. / (idiomatic, by extension) Any source of valuable or useful material.

Japanese Meaning

豊かな鉱脈：金やその他の貴重な鉱物が豊富に含まれる主要な鉱脈。 / 貴重な資源の源：貴重または有用なものが豊富に得られる供給源。