protium

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pro·ti·um

 (prō′tē-əm, prō′shē-)
n.
The most abundant isotope of hydrogen, H-1, having one proton and no neutrons in the nucleus.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

protium

(ˈprəʊtɪəm)
n
(Elements & Compounds) the most common isotope of hydrogen, having a mass number of 1
[C20: New Latin, from proto- + -ium]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pro•ti•um

(ˈproʊ ti əm, -ʃi əm)

n.
the lightest and most common isotope of hydrogen.
[1930–35; < Greek prôt(os) first + -ium2]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

pro·ti·um

(prō′tē-əm, prō′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® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Protium - genus of chiefly tropical American trees having fragrant wood and yielding gum elemi
rosid dicot genus - a genus of dicotyledonous plants
Burseraceae, family Burseraceae, torchwood family - resinous or aromatic chiefly tropical shrubs or trees
Protium heptaphyllum - tropical American tree
Protium guianense - tropical American tree
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
Protium
procio
protium