noun
chatter mark
A technical term for a surface defect or pattern left by a vibrating tool, often used in machining or geology.
この金属表面のチャッターマークは、工具の振動が原因だ。
The chatter marks on this metal surface are caused by tool vibration.
地質学者は岩に残るチャッターマークを調べた。
The geologist examined the chatter marks left on the rock.