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| 148 to 152 of 227 glossary terms |
| planisphere: a representation of a spherical body on a flat surface, commonly a map of the earth or of the heavens.
| planispheric astrolabe: astronomical instrument based on a planispheric projection of the heavens, see article on the astrolabe.
| plate: part of an astrolabe with a projection of altitude and azimuth lines on to the equatorial plane, see article on the astrolabe.
| plumb level: device for determining a horizontal level or an angle of elevation by a plumb line or plummet.
| plumb line: a suspended thread with a weight at its end, indicating the vertical.
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