Definition of Jacob's staff in English:

Jacob's staff

noun ˈdʒeɪkəbz

A rod with a sliding cursor formerly used for measuring distances and heights.
（原用于测量距离和高度的）独脚罗盘支杆
Example sentencesExamples
- In January 1472 he made observations of a comet, using his Jacob's staff, which were accurate enough to allow it to be identified with Halley's comet 210 years (and three returns of the 70 year period comet) later.

Origin

Mid 16th century (denoting a pilgrim's staff): alluding to St James (Jacobus in ecclesiastical Latin), whose symbols are a pilgrim's staff and a scallop shell.

Definition of Jacob's staff in US English:

Jacob's staff

noun

A rod with a sliding cursor formerly used for measuring distances and heights, especially in navigation.
（原用于测量距离和高度的）独脚罗盘支杆
Example sentencesExamples
- In January 1472 he made observations of a comet, using his Jacob's staff, which were accurate enough to allow it to be identified with Halley's comet 210 years (and three returns of the 70 year period comet) later.

Origin

Mid 16th century (denoting a pilgrim's staff): alluding to St James ( Jacobus in ecclesiastical Latin), whose symbols are a pilgrim's staff and a scallop shell.

词汇	Jacob's staff
释义	Definition of Jacob's staff in English: Jacob's staff noun ˈdʒeɪkəbz A rod with a sliding cursor formerly used for measuring distances and heights. （原用于测量距离和高度的）独脚罗盘支杆 Example sentencesExamples In January 1472 he made observations of a comet, using his Jacob's staff, which were accurate enough to allow it to be identified with Halley's comet 210 years (and three returns of the 70 year period comet) later. Origin Mid 16th century (denoting a pilgrim's staff): alluding to St James (Jacobus in ecclesiastical Latin), whose symbols are a pilgrim's staff and a scallop shell. Definition of Jacob's staff in US English: Jacob's staff noun A rod with a sliding cursor formerly used for measuring distances and heights, especially in navigation. （原用于测量距离和高度的）独脚罗盘支杆 Example sentencesExamples In January 1472 he made observations of a comet, using his Jacob's staff, which were accurate enough to allow it to be identified with Halley's comet 210 years (and three returns of the 70 year period comet) later. Origin Mid 16th century (denoting a pilgrim's staff): alluding to St James ( Jacobus in ecclesiastical Latin), whose symbols are a pilgrim's staff and a scallop shell.
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