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 ...
http://dictionary.reference.com/browse/helium
A colorless, odorless inert gaseous element occurring in natural gas and with radioactive ores. It is used as a component of artificial atmospheres and laser ...
http://dictionary.reference.com/browse/helium
a chemical element that is a colorless gas, that is lighter than air, and that is often used to fill balloons. Full Definition of HELIUM. : a light colorless inert gaseous ...
http://www.thefreedictionary.com/helium
De symbole He et de numéro atomique 2, l'hélium est le premier des gaz nobles dans le tableau périodique des éléments. Avec un point d'ébullition de -188 ...
http://www.thefreedictionary.com/helium
Definition of helium in American English in Oxford dictionary. Meaning, pronunciation and example sentences. English to English reference content (US) .
http://www.merriam-webster.com/dictionary/helium
The element helium is a colorless, odorless gas. Because helium is lighter than air, it's commonly used for filling balloons to make them float. Because of the ...
http://www.merriam-webster.com/dictionary/helium
This is the definition of helium. ... A helium filled discharge tube shaped like the element's atomic symbol. pslawinski, metal-halide.net. Definition: Helium is the ...
http://www.futura-sciences.com/magazines/espace/infos/dico/d/univers-helium-4813/
Definition of helium. a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts ...
http://www.futura-sciences.com/magazines/espace/infos/dico/d/univers-helium-4813/