ametallous

ametallous, a. Chem.

(əˈmɛtələs)

[f. Gr. ἀ priv. + µέταλλ-ον mine (taken in sense of L. metall-um metal) + -ous.]

Not of the nature of a metal, non-metallic.

in Syd. Soc. Lex.