Last Updated
：2025/11/29
Jacob's staff
Noun
Japanese Meaning
測量に用いられる器具で、三脚の代わりにコンパスを支えるために使用される。鉄製の先端が装着され、下部で地面にしっかり突き刺すための機能を持ち、上部には他の部分と連結するためのソケットが付いた直線の棒または杖。
Sense（1）
（ plural ）
Quizzes for review
(surveying) A single straight rod or staff, pointed and iron-shod at the bottom, for penetrating the ground, and having a socket joint at the top, used, instead of a tripod, for supporting a compass.
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Jacob's staff
During the coastal survey, the engineer planted Jacob's staff firmly in the sand and set the compass into its socket to take a bearing.
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During the coastal survey, the engineer planted Jacob's staff firmly in the sand and set the compass into its socket to take a bearing.
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