n. [ L. metallum metal + -oid: cf. F. métalloïde. ] (a) Formerly, the metallic base of a fixed alkali, or alkaline earth; -- applied by Sir Humphrey Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined. (b) 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. [ 1913 Webster ]
[lèi jīn shǔ, ㄌㄟˋ ㄐㄧㄣ ㄕㄨˇ, 类金属 / 類金屬] metalloid (chem.), element with properties intermediate between metals and nonmetals, usually taken to include Boron B 硼, Silicon Si 硅, Germanium Ge 鍺|锗, Arsenic As 砷, Antimony Sb 銻|锑, Tellurium Te 碲, Polonium Po 釙|钋 (sometimes also the halogen Astatine A [Add to Longdo]
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