Last Updated：2025/11/25

(engineering) A circle which serves as a reference or base for the measurement of other quantities.

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datum circle

Source Word

datum circle

Noun

(engineering) A circle which serves as a reference or base for the measurement of other quantities.

Japanese Meaning

工学用語で、他の量の測定の基準や参照として使われる円形の基準面や基準円。

The machinist aligned the shaft using the datum circle as the primary reference for all radial measurements.

機械工は軸を整列させるために、すべての半径方向の測定の主要な基準として基準円を用いた。

Sense（1）

(engineering) A circle which serves as a reference or base for the measurement of other quantities.

datum circles

（ plural ）