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paragenesis
paragliding
paragoge
paragon
paragraph
paragraphia
Paraguay
Parahyba
parahydrogen
parainfluenza virus
parajournalism
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paralanguage
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parahydrogen
par·a·hy·dro·gen [ pàrrə hdrəjən ]


noun 
Definition:
 
form of hydrogen: a form of molecular hydrogen in which the two atomic nuclei spin in opposite directions. Parahydrogen makes up about 25 percent of hydrogen molecules.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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