Geological term for a mineral deposit filling a fissure in rock. Used in mining and geology contexts.
この山には金の鉱脈がある。
There is a vein of gold in this mountain.
地質学者は新しい鉱脈を発見した。
The geologist discovered a new ore vein.
gold vein; gold-bearing reef
Compound of 鉱 (ore, mineral) and 脈 (vein, pulse), literally 'ore vein'.