protium

[ proh-tee-uh m, -shee-uh m ]
/ ˈproʊ ti əm, -ʃi əm /

noun Chemistry.

the lightest and most common isotope of hydrogen. Symbol: H1

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transliterate

Origin of protium

First recorded in 1930–35; prot- + -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for protium

British Dictionary definitions for protium

protium
/ (ˈprəʊtɪəm) /

noun

the most common isotope of hydrogen, having a mass number of 1

Word Origin for protium

C20: New Latin, from proto- + -ium
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

Medical definitions for protium

protium
[ prōtē-əm, prōshē- ]

n.

hydrogen-1
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for protium

protium
[ prōtē-əm, -shē-əm ]

The most abundant isotope of hydrogen, having an atomic mass of 1. Its nucleus consists of a single proton. See more at hydrogen.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.