Also found in: Encyclopedia, Wikipedia.
Related to Poynting theorem: Maxwell's equations
(General Physics) the theorem that the rate of flow of electromagnetic energy through unit area is equal to the Poynting vector, i.e. the cross product of the electric and magnetic field intensities
[C19: named after John Henry Poynting (1852–1914), English physicist]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014