tungstous, a. Chem.
(ˈtʌŋstəs)
[f. tungsten + -ous c.]
Applied to compounds in which tungsten combines as a tetrad, as tungstous chloride, WCl4, tungstous oxide, WO2. (Cf. tungstic.)
| 1860 in Mayne Expos. Lex. 1868 Watts Dict. Chem. V. 898 Tungsten forms two classes of compounds, in one of which it is tetratomic, and in the other hexatomic: Tungstous Chloride, WCl4; Tungstous Oxide, WO2. |