Definition of dipole in English:



  • 1A pair of equal and oppositely charged or magnetized poles separated by a distance.

    • ‘The succeeding positive slope arises due to the orientation of the headgroup dipoles.’
    • ‘Interaction between the in-plane components of the headgroup dipoles is attractive and decays as the inverse sixth power of distance.’
    • ‘Dielectric constants of nonpolar solvents arise from induced dipoles.’
    • ‘Dielectric constants of polar solvents are dominated by reorientation of their permanent dipoles.’
    • ‘Underwater mountains, which are usually volcanic, often have magnetic dipoles.’
    1. 1.1 An antenna consisting of a horizontal metal rod with a connecting wire at its center.
      • ‘Marsis features three long antenna booms - a dipole and monopole - that broadcast very long wavelength radio waves toward the planet.’
      • ‘One of the simplest feeds for a microwave antenna is the dipole.’
      • ‘These methods allow engineers to fabricate many different types of planar IR antennas, including dipoles, spirals, and patches.’
      • ‘By this time, Dad and I had replaced the old dipole with a short Yagi array, horizontally polarized of course, and screwed to one of the crossbeams in the attic, so now we had three channels with excellent reception.’
      • ‘The loss of the helical spring antenna is approximately 10 dB compared to a half-wave dipole.’
    2. 1.2Chemistry A molecule in which a concentration of positive electric charge is separated from a concentration of negative charge.
      • ‘In this way, temporary dipoles are propagated through a liquid or solid.’
      • ‘The longer the peptide, the less important is the effect of the helical dipole.’
      • ‘If there is a separation of charge in an bond, it possesses a dipole.’
      • ‘The relative magnitudes of the molecular dipoles can be explained by the relative electronegativity differences of the atoms forming the bonds.’
      • ‘Van der Waals forces are the attractive forces of one transient dipole for another.’