met·al·loid /ˈmɛtḷˌɔɪd/
 (a.)象金屬的,非金屬的,類似金屬性的非金屬,類似金屬,兩性金屬
 met·al·loid /ˈmɛtḷˌɔɪd/ 名詞
 非金屬,類金屬,金屬樣的
 Met·al·loid n.  (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.
 Met·al·loid, a.
 1. Having the appearance of a metal.
 2. Chem. Having the properties of a nonmetal; nonmetallic; acid; negative.
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 metalloid
      adj : of or being a nonmetallic element that has some of the
            properties of metal; "arsenic is a metalloid element"