METALLOID
metalloid
(adjective) of or being a nonmetallic element that has some of the properties of metal; “arsenic is a metalloid element”
Source: WordNet® 3.1
Etymology
Noun
metalloid (plural metalloids)
(chemistry) An element, such as silicon or germanium, intermediate in properties between that of a metal and a nonmetal; especially one that exhibits the external characteristics of a metal, but behaves chemically more as a nonmetal.
(chemistry, obsolete) The metallic base of a fixed alkali, or alkaline earth; applied to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined.
Adjective
metalloid (comparative more metalloid, superlative most metalloid)
(not comparable) Of or relating to the metalloids.
(informal) Characteristic of the metal music genre.
Source: Wiktionary
Met"al*loid, n. Etym: [L. metallum metal + -oid: cf. F. métalloïde.]
(a) 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.
(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.)
Definition: Having the properties of a nonmetal; nonmetallic; acid;
negative.
Source: Webster’s Unabridged Dictionary 1913 Edition