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Metalloid

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• Metalloidal
• Metalloid

(1):

(n.) Formerly, the metallic base of a fixed alkali, or alkaline earth; - applied by Sir H. Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined.

(2):

(n.) Now, one of several elementary substances which in the free state are unlike metals, and whose compounds possess or produce acid, rather than basic, properties; a nonmetal; as, boron, carbon, phosphorus, nitrogen, oxygen, sulphur, chlorine, bromine, etc., are metalloids.

(3):

(a.) Having the appearance of a metal.

(4):

(a.) Having the properties of a nonmetal; nonmetallic; acid; negative.