a device, esp. one used in filmmaking, that can erase a whole roll of magfilm, audiotape, etc., so that it can be used again
Word origin
[degauss + -er1]-er is a suffix used in forming nouns designating persons from the object of their occupationor labor (hatter; tiler; tinner; moonshiner), or from their place of origin or abode (Icelander; southerner; villager), or designating either persons or things from some special characteristic or circumstance(six-footer; three-master; teetotaler; fiver; tenner)