Definition of perminvar in US English:

perminvar

noun

  • Any of a series of alloys containing nickel, iron, and cobalt which have an approximately constant magnetic permeability over a range of field strengths.

Origin

1920s; earliest use found in The Official Gazette. From perm- + invar-.

Pronunciation

perminvar

/ˈpəːmɪnvɑː/