helium

[ hee-lee-uhm ]

/ ˈhi li əm /

noun

an inert, gaseous element present in the sun's atmosphere and in natural gas, and also occurring as a radioactive decomposition product, used as a substitute for flammable gases in dirigible balloons. Symbol: He; atomic weight: 4.0026; atomic number: 2; density: 0.1785 grams/liter at 0°C and 760 millimeters pressure.

Origin of helium

First recorded in 1875–80; from New Latin, from Greek hḗli(os) “the sun” + New Latin -ium noun suffix; see -ium

Words nearby helium

heliozoan, helipad, heliport, heliskiing, helistop, helium, helium flash, helium I, helium II, helix, hell

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for helium

She added in the high-pitched, over-enunciated voice, like she was alternating between sucking on helium and a bong.
SNL’s Kim Kardashian Konundrum: Why Nasim Pedrad’s Exit Hurts So Much|Jason Lynch|September 26, 2014|DAILY BEAST
After he inhaled sulfur hexafluoride, a compound that acts like helium, his voice got very deep.
The Anger Over ‘Tranny,’ From Neil Patrick Harris to RuPaul to Dan Savage|Tricia Romano|January 30, 2012|DAILY BEAST
As for Hydorn, she says that if she herself hits that low spot, she may one day use the helium hood, too.
The 91-Year-Old Woman Selling $60 Suicide Kits|Winston Ross|April 27, 2011|DAILY BEAST
And once, Olivia says, “we got balloons full of helium with messages to him and we let them go at night.”
'I Don't Have a Dad'|Barbara Kantrowitz, Elspeth Reeve|September 11, 2009|DAILY BEAST

Helium is contained almost universally in the gases which bubble up with the water of thermal springs.
Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2|Various
The well-known case of helium gives a striking illustration.
Appletons' Popular Science Monthly, January 1900|Various
The helium thermometer could be used to advantage in the determination of the critical temperature and boiling point of hydrogen.
Scientific American Supplement, No. 1082, September 26, 1896|Various
Here again we have hydrogen and helium represented by bright lines, while the origin of the remaining bright lines is doubtful.
The Story of the Heavens|Robert Stawell Ball
It had been warped by the force of the helium blast, and it was stuck in its grooves.
The Bramble Bush|Gordon Randall Garrett

British Dictionary definitions for helium

helium

/ (ˈhiːlɪəm) /

noun

a very light nonflammable colourless odourless element that is an inert gas, occurring in certain natural gases: used in balloons and in cryogenic research. Symbol: He; atomic no: 2; atomic wt: 4.002602; density: 0.1785 kg/m³; at normal pressures it is liquid down to absolute zero; melting pt: below –272.2°C; boiling pt: –268.90°CSee also alpha particle

Word Origin for helium

C19: New Latin, from helio- + -ium; named from its having first been detected in the solar spectrum

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for helium

helium

A chemical element, usually found in the form of a gas, in which two electrons are in orbit, and the nucleus consists of two protons and two neutrons. Its symbol is He.

notes for helium

Helium is the best known of the inert gases.

notes for helium

Because it is lighter than air, helium is used to fill balloons.

Medical definitions for helium

helium

[ hē′lē-əm ]

n. Symbol He

An inert gaseous element used in liquid form as a cryogen and as a substitute for nitrogen in artificial breathing mixtures for deep-sea diving and workers in high-pressure conditions. Atomic number 2.

Scientific definitions for helium

helium

[ hē′lē-əm ]

He

A very lightweight, colorless, odorless element in the noble gas group. Helium occurs in natural gas, in radioactive ores, and in small amounts in the atmosphere. It has the lowest boiling point of any substance and is the second most abundant element in the universe. Helium is used to provide lift for balloons and blimps and to create artificial air that will not react chemically. Atomic number 2; atomic weight 4.0026; boiling point -268.9°C; density at 0°C 0.1785 gram per liter. See Periodic Table.

Word History

The second most abundant element in the universe after hydrogen, Helium (symbol He) is a colorless, odorless, nonmetallic gas that is produced abundantly by the nuclear fusion in all stars and is found in smaller amounts on Earth. It was discovered by the British scientist-and founding editor of the journal Nature-Joseph Norman Lockyer in 1868, while he was studying a solar eclipse with a spectroscope, an instrument that breaks light up into a spectrum. If an element is heated up enough to glow, the emitted light produces a unique spectrum when refracted through a prism. Lockyer noticed that the spectrum of the Sun's corona, which is visible only during a solar eclipse, contained lines produced by an unknown element. He named the element helium from helios, the Greek word for sun. Helios gives us many other words pertaining to the Sun, such as heliocentric and perihelion.

单词	helium
释义	helium [ hee-lee-uhm ] / ˈhi li əm / noun an inert, gaseous element present in the sun's atmosphere and in natural gas, and also occurring as a radioactive decomposition product, used as a substitute for flammable gases in dirigible balloons. Symbol: He; atomic weight: 4.0026; atomic number: 2; density: 0.1785 grams/liter at 0°C and 760 millimeters pressure. Origin of helium First recorded in 1875–80; from New Latin, from Greek hḗli(os) “the sun” + New Latin -ium noun suffix; see -ium Words nearby helium heliozoan, helipad, heliport, heliskiing, helistop, helium, helium flash, helium I, helium II, helix, hell Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for helium She added in the high-pitched, over-enunciated voice, like she was alternating between sucking on helium and a bong. SNL’s Kim Kardashian Konundrum: Why Nasim Pedrad’s Exit Hurts So Much\|Jason Lynch\|September 26, 2014\|DAILY BEAST After he inhaled sulfur hexafluoride, a compound that acts like helium, his voice got very deep. The Anger Over ‘Tranny,’ From Neil Patrick Harris to RuPaul to Dan Savage\|Tricia Romano\|January 30, 2012\|DAILY BEAST As for Hydorn, she says that if she herself hits that low spot, she may one day use the helium hood, too. The 91-Year-Old Woman Selling $60 Suicide Kits\|Winston Ross\|April 27, 2011\|DAILY BEAST And once, Olivia says, “we got balloons full of helium with messages to him and we let them go at night.” 'I Don't Have a Dad'\|Barbara Kantrowitz, Elspeth Reeve\|September 11, 2009\|DAILY BEAST Helium is contained almost universally in the gases which bubble up with the water of thermal springs. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2\|Various The well-known case of helium gives a striking illustration. Appletons' Popular Science Monthly, January 1900\|Various The helium thermometer could be used to advantage in the determination of the critical temperature and boiling point of hydrogen. Scientific American Supplement, No. 1082, September 26, 1896\|Various Here again we have hydrogen and helium represented by bright lines, while the origin of the remaining bright lines is doubtful. The Story of the Heavens\|Robert Stawell Ball It had been warped by the force of the helium blast, and it was stuck in its grooves. The Bramble Bush\|Gordon Randall Garrett British Dictionary definitions for helium helium / (ˈhiːlɪəm) / noun a very light nonflammable colourless odourless element that is an inert gas, occurring in certain natural gases: used in balloons and in cryogenic research. Symbol: He; atomic no: 2; atomic wt: 4.002602; density: 0.1785 kg/m³; at normal pressures it is liquid down to absolute zero; melting pt: below –272.2°C; boiling pt: –268.90°CSee also alpha particle Word Origin for helium C19: New Latin, from helio- + -ium; named from its having first been detected in the solar spectrum Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for helium helium A chemical element, usually found in the form of a gas, in which two electrons are in orbit, and the nucleus consists of two protons and two neutrons. Its symbol is He. notes for helium Helium is the best known of the inert gases. notes for helium Because it is lighter than air, helium is used to fill balloons. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for helium helium [ hē′lē-əm ] n. Symbol He An inert gaseous element used in liquid form as a cryogen and as a substitute for nitrogen in artificial breathing mixtures for deep-sea diving and workers in high-pressure conditions. Atomic number 2. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for helium helium [ hē′lē-əm ] He A very lightweight, colorless, odorless element in the noble gas group. Helium occurs in natural gas, in radioactive ores, and in small amounts in the atmosphere. It has the lowest boiling point of any substance and is the second most abundant element in the universe. Helium is used to provide lift for balloons and blimps and to create artificial air that will not react chemically. Atomic number 2; atomic weight 4.0026; boiling point -268.9°C; density at 0°C 0.1785 gram per liter. See Periodic Table. Word History The second most abundant element in the universe after hydrogen, Helium (symbol He) is a colorless, odorless, nonmetallic gas that is produced abundantly by the nuclear fusion in all stars and is found in smaller amounts on Earth. It was discovered by the British scientist-and founding editor of the journal Nature-Joseph Norman Lockyer in 1868, while he was studying a solar eclipse with a spectroscope, an instrument that breaks light up into a spectrum. If an element is heated up enough to glow, the emitted light produces a unique spectrum when refracted through a prism. Lockyer noticed that the spectrum of the Sun's corona, which is visible only during a solar eclipse, contained lines produced by an unknown element. He named the element helium from helios, the Greek word for sun. Helios gives us many other words pertaining to the Sun, such as heliocentric and perihelion. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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