grain boundary

Noun

An internal interface that separates neighbouring misoriented single crystals in a polycrystalline solid.

Japanese Meaning

多結晶固体内部で、隣接する結晶粒（単一結晶）がわずかに異なる結晶方位を持つ部分と部分の境界、すなわち粒界

The grain boundary significantly affects the electrical conductivity of the polycrystalline sample.

結晶粒界は多結晶試料の電気伝導率に大きな影響を与える。

Sense（1）

An internal interface that separates neighbouring misoriented single crystals in a polycrystalline solid.

ground boundaries

（ plural ）