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Permalloy

[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.
Origin
1920-1925
1920-25; perm(anent) + alloy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for perm-alloy

permalloy

/pɜːmˈælɔɪ/
noun
1.
any of various alloys containing iron and nickel (45–80 per cent) and sometimes smaller amounts of chromium and molybdenum
Word Origin
C20: from perm(eability) + alloy
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
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