(physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons
concise and full of meaning; "welcomed her pithy comments"; "the peculiarly sardonic and sententious style in which Don Luis composed his epigrams"- Hervey Allen
quick and energetic; "a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze"
the lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field
(biology) the field of science concerned with processes of communication and control (especially the comparison of these processes in biological and artificial systems)