单词 | dipole |
释义 | dipole[ dahy-pohl ] / ˈdaɪˌpoʊl / nounPhysics, Electricity. a pair of electric point charges or magnetic poles of equal magnitude and opposite signs, separated by an infinitesimal distance. Physical Chemistry. a polar molecule. Also called dipole antenna. Radio, Television. an antenna of a transmitter or receiving set consisting of two equal rods extending in opposite direction from the connection to the lead-in wire. Origin of dipoleFirst recorded in 1910–15; di-1 + pole2 OTHER WORDS FROM dipoledi·po·lar, adjectiveWords nearby dipoledip needle, dip net, dipnoan, dipody, dipolar ion, dipole, dipole moment, dip one's toes into, dip out, dipper, dippy Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for dipoledipole / (ˈdaɪˌpəʊl) / nountwo electric charges or magnetic poles that have equal magnitudes but opposite signs and are separated by a small distance a molecule in which the centre of positive charge does not coincide with the centre of negative charge Also called: dipole aerial a directional radio or television aerial consisting of two equal lengths of metal wire or rods, with a connecting wire fixed between them in the form of a T Derived forms of dipoledipolar, adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for dipoledipole [ dī′pōl′ ] A pair of electric charges or magnetic poles, of equal magnitude but of opposite sign or polarity, separated by a small distance. A molecule having two such charges or poles. An antenna consisting of two rods of equal length extending outward in a straight line. Dipole antennas are usually used for frequencies below 30 megahertz. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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