nonmetal

[ non-met-l ]
/ nɒnˈmɛt l /

noun Chemistry.

an element not having the character of a metal, as carbon or nitrogen.
an element incapable of forming simple positive ions in solution.

Origin of nonmetal

First recorded in 1865–70; non- + metal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for non-metal

nonmetal

/ (nɒnˈmɛtəl) /

noun

any of a number of chemical elements that form negative ions, have acidic oxides, and are generally poor conductors of heat and electricity
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