metalloid

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Noun[change]

Singular
metalloid

Plural
metalloids

  1. A metalloid is an element that is not a metal, but looks or acts like a metal.
    Boron is a metalloid because it looks like metal, but it is not as strong.
  2. A metalloid is an element that can be mixed with metal to make an alloy.
    Carbon is a metalloid which makes cast iron when mixed with iron.