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Permalloy

American  
[purm-al-oi, pur-muh-loi] / ˌpɜrmˈæl ɔɪ, ˈpɜr məˌlɔɪ /
Trademark.

  1. a brand name for any of a class of alloys of high magnetic permeability, containing from 30 to 90 percent nickel.

permalloy British  
/ pɜːmˈælɔɪ /

noun

  1. any of various alloys containing iron and nickel (45–80 per cent) and sometimes smaller amounts of chromium and molybdenum

"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

Etymology

Origin of Permalloy

First recorded in 1920–25; perm(anent) + alloy

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.