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quadrupole

British  
/ ˈkwɒdrʊˌpəʊl /

noun

  1. physics a set of four associated positive and negative electric charges or two associated magnetic dipoles

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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That is why the team made use of the molecule's electric quadrupole moment.

From Science Daily Feb. 27, 2024

This lightweight, cheap, yet precise quadrupole is one important step in Luis Fernando Velásquez-García's 20-year quest to produce a 3D-printed, portable mass spectrometer.

From Science Daily Jan. 4, 2024

Their miniaturized filter, known as a quadrupole, can be completely fabricated in a matter of hours for a few dollars.

From Science Daily Jan. 4, 2024

Giant quadrupole resonance in 24,26Mg: a comparison of inelastic-scattering and α-capture experiments.

From Nature May 22, 2018

Regardless of their physical origin, both quadrupole moments and ESP maps provide reasonable qualitative guides to tuning the strength of anion–π interactions.

From Nature Mar. 28, 2017

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