| lateral quadrupole [`lad·ǝ·rǝl `kwäd·rǝ´pōl] ACOUSTICS A sound source resulting from a variation of a component of the velocity of matter in a direction perpendicular to the velocity component. ELECTROMAGNETISM An electric or magnetic quadrupole which produces a field equivalent to that of two equal and opposite electric or magnetic dipoles separated by a small distance perpendicular to the direction of the dipoles. |