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Eng ID | Term | Definition |
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5781 | underwater sound projector | A TRANSDUCER used to produce SOUND in water. The conversion from electrical energy to SOUND is achieved through the use of either the piez... more |
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5782 | underway (or under way) | (adv.). Without MOORINGS; not secured in any way to the ground or a WHARF. In motion, particularly the start of such motion after a standsti... more |
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5783 | undulating | (adj.). Having the form of WAVES or SWELLS, as undulating LAND. |
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5784 | undulation | A continuously propagated motion to and from, in any fluid or elastic medium, with no permanent translation of the particles themselves. |
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5785 | undulation of the geoid | The distance between the mathematical REFERENCE SPHEROID and the GEOID. |
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5786 | unidirectional antenna | See ANTENNA. |
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5787 | unifilar magnetometer | See MAGNETOMETER. |
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5788 | uniform flow | Any CURRENT in which neither CONVERGENCE nor DIVERGENCE is present. |
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5789 | unit magnetic pole | In magnetic theory, a fictitious entity analogous to a unit electric charge in electrostatic theory. |
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5790 | United Nations (UN) | The major international organization established to maintain international peace and security, to develop friendly relations among nations,... more |
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5791 | United Nations Conference on Trade and Development (UNCTAD) | Helps to restructure patterns of international trade in order to enable developing countries to play their part in world commerce. |
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5792 | United Nations Development Programme (UNDP) | An UN agency which registers organizations and institutions located in developing countries which have the capacity for cooperative technic... more |
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5793 | United Nations Educational, Scientific, and Cultural Organization (UNESCO) | Organized in 1945 to promote collaboration among nations in education, science, and culture; UNESCO is the parent agency for the INTERGOVERN... more |
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5794 | universal drafting machine | See PROTRACTOR: PARALLEL MOTION. |
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5795 | universal level | See LEVEL: SPIRIT. |
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5796 | Universal Time (UT) | TIME as defined by the rotational motion of the EARTH and determined from the apparent diurnal motions which reflect this ROTATION. Because ... more |
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5797 | Universal Time 0 (UT0) | The uncorrected TIME of the EARTH's ROTATION as measured by the TRANSIT of STARS across the observer's MERIDIAN. This ROTATION is referred ... more |
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5798 | Universal Time 1 (UT1) | UT0 corrected for polar motion. |
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5799 | Universal Time 2 (UT2) | UT1 corrected for seasonal variations in the EARTH's ROTATION. |
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5800 | Universal Time Coordinated (UTC) | The time scale that is available from most broadcast time signals. It differs from INTERNATIONAL ATOMIC TIME by an integral number of second... more |