|
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.
|
plummet: a form of plumb line in which the 'line' and weight are a single rigid piece.
|
polar dial: type of sundial, see article on the sundial.
|
polyhedral dial: sundial with hour lines on various faces of a solid figure, see article on the sundial.
|
