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metalloid

[met-l-oid] /ˈmɛt lˌɔɪd/
noun
1.
a nonmetal that in combination with a metal forms an alloy.
2.
an element that has both metallic and nonmetallic properties, as arsenic, silicon, or boron.
adjective
3.
of or pertaining to a metalloid.
4.
resembling both a metal and a nonmetal.
Origin
1825-1835
1825-35; metall- + -oid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for metalloids
  • Geochemical cycles of metals and metalloids in mining-impacted pit lakes.
British Dictionary definitions for metalloids

metalloid

/ˈmɛtəˌlɔɪd/
noun
1.
a nonmetallic element, such as arsenic or silicon, that has some of the properties of a metal
adjective
2.
of or being a metalloid
3.
resembling a metal
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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metalloids in Science
metalloid
  (mět'l-oid')   
  1. An element that is not a metal but that has some properties of metals. Arsenic, for example, is a metalloid that has the visual appearance of a metal, but is a poor conductor of electricity; metalloids are generally semiconductors. The elements classified as metalloids are boron, silicon, germanium, arsenic, antimony, tellurium, and polonium. Metalloids can be viewed as a diagonal section on the Period Table, separating metals from nonmetals.

  2. A nonmetallic element, such as carbon, that can form alloys with metals.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for metalloids

metalloid

a chemical element with properties intermediate between those of typical metals and nonmetals. Usually considered under this classification are the chemical elements boron, silicon, germanium, arsenic, antimony, and tellurium. The rare elements polonium and astatine are also sometimes included. Most of these elements are important industrial materials, being used to make transistors and other semiconductor devices, ceramics, solar batteries, and certain polymers.

Learn more about metalloid with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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