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sulfur

[suhl-fer]

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noun

Also, especially British, sulphur. Chemistry. a nonmetallic element that exists in several forms, the ordinary one being a yellow rhombic crystalline solid, and that burns with a blue flame and a suffocating odor: used especially in making gunpowder and matches, in medicine, in vulcanizing rubber, etc. Symbol: S; atomic weight: 32.064; atomic number: 16; specific gravity: 2.07 at 20° C.

sulphur (def. 2).

Origin:
1300–50; Middle English sulphur < Latin sulpur, sulphur, sulfur brimstone, sulfur

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To sulfur

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Sulfur is always a great word to know.

So is gobo. Does it mean:

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...

Example Sentences

The observatory also warned of lethal levels of sulfur dioxide near the vents.

The new coal plants will pollute the air with nitrogen oxide, sulfur dioxide and mercury.

It too is composed mostly of iron, plus substantial amounts of sulfur and nickel.

EXPAND

The observatory also warned of lethal levels of sulfur dioxide near the vents.

The new coal plants will pollute the air with nitrogen oxide, sulfur dioxide and mercury.

It too is composed mostly of iron, plus substantial amounts of sulfur and nickel.

Coal has lots of pollution problems besides sulfur and nitrogen compounds.

Bacteria that can live on sulfur in hydrothermal vents would seem promising.

Unlike lime sulfur, elemental sulfur cannot be used in conjunction with oils: the combination will kill plants.

Increased sulfur emissions… and look at the state of this place.

Ruckelshaus's proposal to begin reducing sulfur dioxide emissions as soon as possible.

Of course, we'll have cold snaps in the future, after we've commenced with out sulfur dioxide injections into the stratosphere.

Mothers can even carry sulfur poisoning over to their children through mother milk.

The revitalized flames erupted, engulfing the region in a haze of soot, carbon monoxide and compounds of sulfur and nitrogen.

And sulfur has been used as a wine preservative since antiquity.

Sulfur dioxide carries health risks when it cycles out of the stratosphere.

And please no intentional sulfur injection into atmosphere or similar technocratic lunacies.

Thankfully, sulfur emissions from volcanoes and human coal burning cause global cooling.

Use horticultural oil either alone or mixed with lime sulfur or fixed copper.

Sulfur dioxide poisoning and excess heat caused scores of thousands of deaths.

Injecting sulfur dioxide into the atmosphere is hardly the best option.

To control peach blight and peach leaf curl, spray with lime sulfur mixed with dormant oil after leaves have dropped.

Sulfur dioxide emissions have also dropped over the last few days.

Just a sulfur molecule with two methyl groups attached.

Add soil sulfur according to manufacturer's directions.

Sulfur dioxide gas released by the eruption traveled farther.

They absorbed near-infrared rather than visible light and produced sulfur or sulfate compounds rather than oxygen.

To control the diseases as well as scale insects, use sprays combining horticultural oil with either lime sulfur or fixed copper.

Maui onion is sweeter and less pungent than a regular onion because of its lower sulfur content.

Lime sulfur may prevent spores from attaching to plant parts.

Dust cuts with sulfur or charcoal to discourage rot.

Sulfur dioxide combines with moisture in the air to produce acid rain.

Marsh smell is from non-anthropogenic reduced sulfur compounds, similar if not identical to that all-familiar pulp mill aroma.

Sulfur and mineral salts from upwelling springs create vivid colors.

New ideas for making sodium sulfur batteries could make them the answer for taming the variability of wind.

Compared with fossil fuels, it emits less carbon monoxide and hydrocarbons, as well as sulfur compounds related to acid rain.

The work focuses on two types of sulfur compounds known as sulfates and sulfides.

Bacteria grow by using the chemical energy of reduced sulfur compounds, plentiful in the warm vent water.

Hen of the woods should not be confused with chicken of the woods, the more appetizing pseudonym of the sulfur shelf mushroom.

The bulk of the molecule is a carbon backbone, with a small number of nitrogen and sulfur molecules thrown.

Two main ingredients of coal smoke are particulate and sulfur dioxide pollution.

The organisms also absorb nitrogen oxide and sulfur dioxide, which contribute to acid rain.

Iron and sulfur in the mineral are transformed into iron-laden sulfuric acid.

It spurred a revolution in sulfur dioxide scrubbing technologies.

Instruments also measured high levels of sulfur in the rocks, probably in the form of sulfur salts.

The colors represent different elements present after the blast: hydrogen in red, oxygen in blue, and sulfur in green.

To determine how much lime or sulfur to add, follow the advice included with your test results.

Methane is the source of hydrogen, and gypsum is the source of sulfur in hydrogen sulfide.

Sulfur dioxide combines with water vapor to form sulfuric acid particles that scatter, reflect, and absorb sunlight.

Finally, sulfur can damage the internal enzyme systems of animals.

When they reach their maximum weight, he'll add the sulfur concoction to the soil.

Levels of sulfur in diesel fuel and lead in gasoline are especially high.

Likewise, acid rain from sulfur dioxide pollution has destroyed much of the vegetation in the area.

The sulfur from the matches will combine with the ammonia to produce ammonium sulfide.

Reports from the scene indicated that flames and smoke filled the horizon and the smell of sulfur hung heavy in the air.

As it emerges from the spinner, the scientists add groups of carbon and sulfur atoms to the thread.

That's because today's airplane fuels are low in sulfur, and power plants now dominate sulfur dioxide emissions.

The sulfur content determines how dirty the emissions will.

The concern, he says, isn't the lava so much as the poisonous chlorine and sulfur gases that rise from the volcano's.

These might be dipped in sulfur oil or a saline solution.

Sulfur dioxide is a pollutant that helps produce acid rain.

Sulfate forms when a charged sulfur atom binds with four oxygen atoms.

Sulfur dioxide turns into sulfuric acid which is hazardous to health.

Sulfur in the ash reacted with atmospheric ozone to scatter sunlight, causing vivid red sunsets around the world.

On its own, sulfur dioxide gas dissolves in the water on a wet leaf, increasing the acidity of the water.

Scientists have found huge concentrations of sulfur on the planet, thought to have formed as a result of water evaporating.

The newly freed sulfur atoms would then change color and lend the area its distinctive tinge.

Flug, as raising concerns about sulfur dioxide levels.

The volcano also belched an enormous amount of sulfur dioxide into the atmosphere.

They were looking for evidence of a green sulfur bacterium that they suspected.

Plants use sulfur to manufacture cysteine and methionine, two amino acids important for producing protein.

For example, bacteria living in active volcanoes oxidize sulfur to produce their own food.

Pinatubo eruption, the largest volcanic blast of the century, a band of sulfur aerosol had encircled the globe.

They also hope to reduce its viscosity and cut its sulfur and nitrogen content.

See the amazing fjords, glaciers, and sulfur springs.

It is a technique to reduce mineral content of coal so that it burns with less sulfur and nitrogen oxide emissions.

Ash and sulfur dioxide spread through the atmosphere.

The gases under consideration are sulfur compounds that would produce sulfate aerosols in the upper atmosphere.

Most could pick up the smell of methyl mercaptan, a sulfur compound released as our guts digest the vegetable.

Venus has a thick atmosphere of carbon dioxide, with traces of poisonous gases such as sulfur dioxide.

Others believe sulfur released by the impact lead to global sulfuric acid clouds that blocked the sun and also fell as acid rain.

Insecticidal soaps, petroleum-based oils and sulfur also control insect pests.

The smell is caused by the release of methane and sulfur as the blooms decompose.

Sulfur and copper are minerals with a long history of use to control fungal diseases.

In addition, the distribution and transmission of electricity relies on sulfur hexafluoride.

COLLAPSE

Collins

World English Dictionary

sulfur (ˈsʌlfə)

—n
	the US preferred spelling of sulphur

sulphur or sulfur (ˈsʌlfə)

—n
	a. an allotropic nonmetallic element, occurring free in volcanic regions and in combined state in gypsum, pyrite, and galena. The stable yellow rhombic form converts on heating to monoclinic needles. It is used in the production of sulphuric acid, in the vulcanization of rubber, and in fungicides. Symbol: S; atomic no: 16; atomic wt: 32.066; valency: 2, 4, or 6; relative density: 2.07 (rhombic), 1.957 (monoclinic); melting pt: 115.22°C (rhombic), 119.0°C (monoclinic); boiling pt: 444.674°CRelated: thionic
	b. (as modifier): sulphur springs

Related: thionic

[C14 soufre, from Old French, from Latin sulfur]

sulfur or sulfur

—n

Related: thionic

[C14 soufre, from Old French, from Latin sulfur]

sulphuric or sulfur

—*adj*

sulfuric or sulfur

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

sulfur

c.1300, from O.Fr. soufre (13c.), from L.L. sulfur, from L. sulphur, probably from a root meaning "to burn." Ousted native brimstone and cognate O.E. swefl.

American Heritage

Medical Dictionary

sulfur sul·fur or sul·phur (sŭl'fər)
n.
Symbol S
A yellow nonmetallic element occurring widely in nature in several free and combined allotropic forms and used in the manufacture of pharmaceuticals and many sulfur compounds, especially sulfuric acid. Atomic number 16; atomic weight 32.066; melting point (rhombic) 112.8°C; (monoclinic) 119.0°C; boiling point 444.6°C; specific gravity (rhombic) 2.07; (monoclinic) 1.957; valence 2, 4, 6.

American Heritage

Science Dictionary

sulfur also sulphur (sŭl'fər) Pronunciation Key
Symbol S
A pale-yellow, brittle nonmetallic element that occurs widely in nature, especially in volcanic deposits, minerals, natural gas, and petroleum. It is used to make gunpowder and fertilizer, to vulcanize rubber, and to produce sulfuric acid. Atomic number 16; atomic weight 32.066; melting point (rhombic) 112.8°C; (monoclinic) 119.0°C; boiling point 444.6°C; specific gravity (rhombic) 2.07; (monoclinic) 1.957; valence 2, 4, 6. See Periodic Table.

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