Definitions

1. noun

A chemical element that exhibits some properties of metals and some of nonmetals, typically having an intermediate position in the periodic table.

“The metalloid boron is used in semiconductors and fibers.”

2. noun

A substance intermediate in properties between metals and nonmetals, often having a partially metallic character.

“Arsenic is a metalloid that can be used in pesticides.”

3. noun

A chemical element that has properties of both metals and nonmetals.

“Antimony is a metalloid used in flame retardants.”