Epact Scientific Instruments of Medieval and Renaissance Europe

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48 to 52 of 227 glossary terms
crucifix dial: form of polyhedral sundial in the shape of a crucifix, see article on sundial.
cylinder dial: type of altitude dial, see article on the sundial.
declination: angle above or below the celestial equator.
declinatory: instrument used in constructing a sundial, to find the declination of a plane.
degrees: the conventional divisions of a circle, one being the 360th part of a circle, and thus the units used to measure and express angles.
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