1. Of or being a nonmetallic element that has some of the properties of metal
   "arsenic is a metalloid element"
    
2. Having properties of both metals and non-metals
   "Boron exhibits metalloid behaviour in its chemical reactions"

1. An element with properties intermediate between metals and non-metals
   "Silicon is a well-known metalloid used in electronics"

Derived forms: metalloids

See also: nonmetal, nonmetallic

Encyclopedia: Metalloid