grain size

(geology, photography) The size of a grain (particle) in a sediment or emulsion

Japanese Meaning

粒径（堆積物や乳剤中の粒子の大きさ）

The sediment's grain size varied considerably between the riverbed and the floodplain.

堆積物の粒径は河床と氾濫原の間で著しく異なっていた。

Sense（1）

(geology, photography) The size of a grain (particle) in a sediment or emulsion

grain sizes

（ plural ）