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42 to 51 of 227 glossary terms
compass rose: diagram of the points of the compass, often decorated and coloured. North is usually indicated by a fleur-de-lys.
compasses: instrument for drawing circles. see article on drawing instruments.
compendium: several instruments compiled into one device; also see article on astronomical compendium.
conjunction: two planets having the same position (in longitude) in the ecliptic are said to be in conjunction. This relative position had important astrological significance.
cross-staff: instrument for measuring angles between distant objects, mostly altitudes, see article on cross-staff.
