SUPERSULPHATE
Su`per*sul"phate, n. (Chem.)

Defn: An acid sulphate. [Obs.]

SUPERSULPHURETED
Su`per*sul"phu*ret`ed, a. (Chem.)

Defn: Supersulphurized. [Obs.] [Written also -sulphuretted.]

SUPERSULPHURIZE
Su`per*sul"phur*ize, v. t. (Chem.)

Defn: To impregnate or combine with an excess of sulphur.

SUPERTAX
Su"per*tax`, n. [Super- + tax.]

Defn: A tax in addition to the usual or normal tax; specif., in the United Kingdom, an income tax of sixpence for every pound in addition to the normal income tax of one shilling and twopence for every pound, imposed, by the Finance Act of 1909-1910 (c. 8, ss 66, 72), on the amount by which the income of any person exceeds £3,000 when his total income exceeds £5,000.

SUPERTEMPORAL
Su`per*tem"po*ral, n.

Defn: That which is more than temporal; that which is eternal. [R.]