TERMIUM Plus®

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Filter results by subject field Alphabetical list of terms

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Alphabetical list of terms

Record 1 1986-03-05

English

Subject field(s)
  • Facilities and Instruments (Astronomy)
DEF

A navigational instrument for measuring the altitude of the sun, introduced during the 16th century.

OBS

[This instrument] gained its name because, unlike the cross-staff which it replaced, the user had the sun behind him when taking an observation.

French

Domaine(s)
  • Installations et instruments (Astronomie)
DEF

Instrument ancien de mesure des angles, en particulier des hauteurs, constitué d'une lunette de visée mobile accolée à un grand secteur de 45° très finement divisé, sur lequel on lisait les rotations de la lunette.

Spanish

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