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93 to 97 of 227 glossary terms
horary quadrant: quadrant used to tell the time, usually from a measure of solar altitude, see article on the quadrant.
horizon obliquus: line denoting the local horizon on an astrolabe latitude plate, see article on the astrolabe.
horizon rectus: east-west line on an astrolabe latitude plate, see article on the astrolabe.
horizontal dial: sundial where the hour lines are marked on a horizontal surface, see article on the sundial.
hour lines: the time divisions on a sundial or other astronomical instrument.
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