QED

Definition

(Partial) initialism of quantum electrodynamics.

Etymology

From q(uantum) e(lectro)d(ynamics).

Example Sentences

• "QCD is a theory of quark interactions much analogous to QED: the interaction is carried by "gluons" (analogous to photons) which couple to the "color" (analogous to charge) of the quarks."
• "By the way, these days QED is considered a relatively simple example of a quantum field theory."
• "QED is the theory that explains how electrically charged particles, like electrons, interact with each other and with particles of light (photons). […] Pretty much everything else – certainly everything you see and feel around you – is explained at the deepest known level by QED. Matter, light, electricity and magnetism – it is all QED."