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7 to 16 of 227 glossary terms
altitude dial: sundial measuring time from the altitude of the sun.
armillary sphere: set of rings corresponding to the circles of the celestial sphere, see article on the armillary sphere.
aspectarium: aide-memoire which depicts the astrologically significant angles (or aspects) between the planets.
astrolabe: astronomical instrument based on a planispheric projection of the heavens, see article on the astrolabe.
astrolabe quadrant: quadrant that has many of the lines and functions of the ordinary astrolabe, projected for a single latitude.
astrolabum catholicum: type of universal astrolabe, see article on the astrolabe.
astrological houses: 12-part division of the heavens centred on the celestial pole, also called 'houses of heaven', see article on the astrolabe.
astrological instrument: an instrument whose primary use was for astrological purposes, such as casting horoscopes, rather than for observational astronomy.
astronomical clock: a clock incorporating astronomical instruments such as an astrolabe or armillary sphere.
astronomical compendium: several instruments compiled into one device, see article on the astronomical compendium.
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