mumetal

mumetal (uncountable)

1. Alternative form of mu-metal.
   • 1963 September, “A.W.S. progress on the Southern”, in Modern Railways, page 171:

     The receivers on the trains have also been fitted with a mumetal screen to ensure that they react only to vertical inductance.

• “mumetal”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

Borrowed from English mumetal.

mumetal n (uncountable)

1. mu-metal