Sulphion
Pronunciation : Sul"phi*on
Part of Speech : n.
Etymology : [Sulpho- + ion.] (Chem.)
Definition : Defn: A hypothetical radical, SO4, regarded as forming the acid or negative constituent of sulphuric acid and the sulphates in electrolytic decomposition; -- so called in accordance with the binary theory of salts. [Written also sulphione.]
Source : Webster's Unabridged Dictionary, 1913