metalloidaladj.
/ˌmɛtəˈlɔɪdl/, U.S. /ˌmɛdəˈlɔɪd(ə)l/ Chemistry.
Having the nature, form, or appearance of metal; = metalloid adj.In quot. 1825 reporting Babbage & Herschel, who however do not use the term in their paper ( Philos. Trans. Royal Soc. 115).
ΚΠ
1825 Q. Jrnl. Sci. & Arts July 276 Carbon in that peculiar metalloidal state in which it is precipitated from carbonated hydrogen in gas works.
1837 J. Phillips Treat. Geol. I. 27 The remaining substances are metallic or metalloidal. Seven of them are earthy metals or metalloids.
1880 R. A. Proctor Rough Ways 86 The matter forming the solid centre of the earth consists probably of metallic and metalloidal compounds.
1896 A. H. Chester Dict. Names Minerals 174 Metalloidal diallage,..so named because it is a diallage with metallic lustre.
1902 Living Age 27 Nov. 520/2 The emergence of metalloidal bands in the spectra of the stars.
1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xiii. 645 However, despite the metalloidal character of the free element, the ionization energies and electronegativity of As are similar to those of P.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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adj.1825