follow Dictionary.com

Do you know ghouls from goblins and ghosts?

parahydrogen

[par-uh-hahy-druh-juh n] /ˌpær əˈhaɪ drə dʒən/
noun, Physics, Chemistry
1.
the form of molecular hydrogen in which the nuclei of the two hydrogen atoms contained in the molecule have spins in opposite directions.
Compare orthohydrogen.
Origin
1925-1930
1925-30; para-1 + hydrogen
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for para hydrogen

parahydrogen

/ˌpærəˈhaɪdrədʒən/
noun
1.
(chem) the form of molecular hydrogen (constituting about 25 per cent of the total at normal temperatures) in which the nuclei of the two atoms in each molecule spin in opposite directions Compare orthohydrogen
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
Cite This Source

Word of the Day

Difficulty index for parahydrogen

Few English speakers likely know this word

Word Value for para

6
7
Scrabble Words With Friends