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(chemistry, uncountable) helium
Helium is a noble gas used in party balloons.
(Greek mythology) Helios (god of the sun)
Helios illuminated the world with his radiant light.
(chemistry) antihelium (antimatter form of helium)
Antihelium is an antimatter form of helium.
plural of hélio
The helios are chemical elements of the periodic table.
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