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Noun: cross-staff  'krós,stãf
  1. (nautical) an early navigational instrument, consisting of a wooden rod with a sliding crosspiece, used for measuring the altitude of a star; it developed into the sextant

Derived forms: cross-staffs

Encyclopedia: Cross-staff

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cross-sectional
cross-sentential
cross-shaped
cross-staff
cross-stitch
crosstalk
crosstie
crosstown
cross-town
cross-train
crosswalk
crossway
crossways
crosswind