English Dictionary

cross-staff

noun

(ecclesiastical, obsolete) A archbishop's cross. / (historical) An early instrument, consisting of a wooden rod with a sliding crosspiece, used for measuring the altitude of a star or for surveying.

The musician used a cross-staff to notate the music.

意味（1）

(ecclesiastical, obsolete) A archbishop's cross.

意味（2）

(historical) An early instrument, consisting of a wooden rod with a sliding crosspiece, used for measuring the altitude of a star or for surveying.

The cross-staff is a very simple instrument, a calibrated shaft along which a bar slides.