Noun
(music) An electronic device or software that alters the sound of an instrument by combining out-of-phase copies of its original sound.
(US) A mechanical device used to remove ice and snow from railway lines.
Source: en.wiktionary.orgWhen performing live, he uses banks of Vox AC30 amplifiers keeping some amps with only guitar and others with all effects such as delay, flanger and chorus. Source: Internet
The phaser effect was originally a simpler implementation of the flanger effect since delays were difficult to implement with analog equipment. Source: Internet