side band

or side·band

noun Radio.

the band of frequencies at the sides of the carrier frequency of a modulated signal.

Origin of side band

First recorded in 1795–1805

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for sideband

sideband

noun

the frequency band either above (upper sideband) or below (lower sideband) the carrier frequency, within which fall the spectral components produced by modulation of a carrier waveSee also single sideband transmission

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