|
Eng ID | Term | Definition |
---|---|---|---|
|
3861 | picture plane | A plane upon which a system of lines or RAYS from an object to form an IMAGE or picture can be projected. In perspective drawing, the system... more |
|
3862 | piedmont | (adj.). Situated or formed at the base of MOUNTAINS. |
|
3863 | pie graph | Circular SYMBOL divided into sectors to indicate proportions of a total value. |
|
3864 | pier | A long, narrow structure extending into the water to afford a berthing place for vessels, to serve as a promenade, etc. See also JETTY. |
|
3865 | pierhead | The outer end of a PIER. Also called wharfhead. |
|
3866 | piezoelectric effect | The PHENOMENON, exhibited by certain crystals, in which mechanical compression produces a potential difference between opposite crystal fa... more |
|
3867 | piezoelectricity | The property exhibited by some asymmetrical crystalline materials which when subjected to strain in suitable directions develop electric ... more |
|
3868 | piggot gun | A coring instrument for obtaining deep-sea BOTTOM SAMPLES. This instrument uses an explosive charge to drive a metal bit into the BOTTOM at ... more |
|
3869 | pigmentation | A colouring of tissue by deposition of PIGMENTS. |
|
3870 | pigments | A colouring matter used as paint or dye or a natural colouring matter of a tissue. |
|
3871 | pile | A long heavy timber or section of steel, wood, concrete, etc., forced into the earth or SEAFLOOR to serve as a support, as for a PIER, or t... more |
|
3872 | piling | A group of piles set in a row. |
|
3873 | pillar buoy | A BUOY composed of a tall central structure on a broad flat base. |
|
3874 | pilot | 1. A person who directs the movements of a vessel through pilot waters, usually a person who has demonstrated extensive knowledge of channel... more |
|
3875 | pilot chart | See CHART. |
|
3876 | pilot station | The office or headquarters of pilots; the place where the services of a pilot may be obtained. |
|
3877 | pilot waters | Areas in which the services of a marine pilot are available. Waters in which NAVIGATION is by piloting. More usually called pilotage waters ... more |
|
3878 | pilotage waters | See PILOT WATERS. |
|
3879 | ping | An acoustic pulse signal projected by an underwater TRANSDUCER. |
|
3880 | pinger | A battery powered acoustic device equipped with a TRANSDUCER that transmits SOUND WAVES. When the pinger is attached to a wire and lowered i... more |