cross-staff

名词 n.
中文释义

英文释义

名词 n.
  1. An archbishop's cross. obsolete
  2. An early instrument, consisting of a wooden rod with a sliding crosspiece, used for measuring the altitude of a star or for surveying. historical
    — The cross-staff is a very simple instrument, a calibrated shaft along which a bar slides.

词形变化

cross-staffs plural cross-staves plural
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