noun (used with a singular verb)
the branch of magnetics that deals with magnetic fields that do not vary with time (magnetostatic fields).
Origin of magnetostatics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(functioning as singular) physics the study of steady-state magnetic fields
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