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Eng ID | Term | Definition |
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3761 | pendulum: working | A PENDULUM which is used (swung) in a determination of the INTENSITY OF GRAVITY. |
|
3762 | pendulum sextant | See SEXTANT. |
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3763 | peninsula | A piece of LAND that is almost an ISLAND, being nearly surrounded by water; by extension any piece of LAND projecting into the SEA, so that ... more |
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3764 | peninsula: submarine | An elevated portion of the SUBMARINE RELIEF resembling a PENINSULA. The opposite is SAC. |
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3765 | perch | A staff placed on top of a BUOY, ROCK, or SHOAL as a MARK for navigators. A ball or cage is sometimes placed at the top of the perch, as an ... more |
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3766 | percolation | The process by which water is forced by wave action through the interstices of the bottom sediment and has a tendency to reduce WAVE HEIGHT... more |
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3767 | perigean range (of tide) | The average of all monthly TIDE RANGES occurring at the TIME of PERIGEE. It is larger than the MEAN RANGE, where the TYPE OF TIDE is either ... more |
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3768 | perigean tides | See TIDE. |
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3769 | perigee | That orbital point nearest the EARTH when the EARTH is the centre of attraction, as opposed to APOGEE. |
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3770 | perihelion | That orbital point nearest the SUN, when the SUN is the centre of attraction, as opposed to APHELION. |
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3771 | period | The interval needed to complete a CYCLE. Any specified duration of time. |
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3772 | period (of a navigational light) | The TIME taken to exhibit one complete sequence of intervals of light and darkness. |
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3773 | periodic current | See CURRENT. |
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3774 | periodic error | See ERROR. |
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3775 | periodic wave(s) | See WAVE. |
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3776 | peripheral equipment | In computer systems, any unit of equipment, distinct from the central unit, which may provide the system with outside communication. |
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3777 | permafrost | A LAYER of SOIL or BEDROCK at a variable depth beneath the surface of the EARTH in which the temperature has been below freezing continuousl... more |
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3778 | permanent current | See CURRENT. |
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3779 | Permanent International Association of Navigation Congresses (PIANC) | Fosters progress of inland and maritime waterways, of ports and of coastal areas by research and information exchange. |
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3780 | permanent magnetism | See MAGNETISM. |