helium

helium definition - medical

he·li·um (hēˈlē-əm)

noun 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® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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