sulfuric acid

noun

: a heavy corrosive oily dibasic strong acid H₂SO₄ that is colorless when pure and is a vigorous oxidizing and dehydrating agent

Is it sulfur or sulphur?: Usage Guide

The spelling sulfur predominates in U.S. technical usage, while both sulfur and sulphur are common in general usage. British usage tends to favor sulphur for all applications. The same pattern is seen in most of the words derived from sulfur.

Examples of sulfuric acid in a Sentence

Recent Examples on the Web

Berkley’s dies by suicide by jumping off a balcony outside their office window; Simpson’s goes crazy and attacks her ex with sulfuric acid. —Alison Herman, Variety, 4 Nov. 2025

That’s because when high-altitude clouds of sulfur dioxide eventually form sulfuric acid, the resulting acid rain will help destroy the forests, jungles, crops, tigers, penguins, and reindeer that SAI was supposed to protect. —New Atlas, 4 Nov. 2025

The 3-foot-wide (1 meter) descent probe will fall to the surface of Venus and catalog its punishingly thick atmosphere and sulfuric acid-laden clouds along the way, as well as take some images of Venus' surface terrain. —Elizabeth Howell, Space.com, 4 Nov. 2025

The microbes still need a small amount of sulfuric acid to kick-start the process of breaking down the ore. —Vanessa Bates Ramirez, Scientific American, 1 Oct. 2025

Word History

First Known Use

1788, in the meaning defined above

Rhymes for sulfuric acid

• antacid
• placid

Kids Definition

sulfuric acid

noun

: a heavy oily strong acid that is colorless when pure and eats away at many solid substances

Medical Definition

sulfuric acid

noun

: a heavy corrosive oily dibasic strong acid H₂SO₄ that is colorless when pure and is a vigorous oxidizing and dehydrating agent see oil of vitriol