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[pred-nuh-sohn, -zohn] /ˈprɛd nəˌsoʊn, -ˌzoʊn/
noun, Pharmacology.
an analogue of cortisone, C 2 1 H 2 6 O 5 , used as an anti-inflammatory, immunosuppressive, and antineoplastic in the treatment of various diseases.
Origin of prednisone
1950-55; pre(gna)d(ie)n(e), a component of its chemical name + (cort)isone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for prednisone


a steroid drug derived from cortisone and having the same uses
Word Origin
C20: perhaps from pre(gnant) + -d(ie)n(e) + (cort)isone
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
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Word Origin and History for prednisone

1955, probably from elements of pregnadiene (from pregnane, name of the compound from which pregnancy hormones were derived, from the Latin stem of pregnancy) + ending from cortisone.

Online Etymology Dictionary, © 2010 Douglas Harper
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prednisone in Medicine

prednisone pred·ni·sone (prěd'nĭ-sōn',-zōn')
A synthetic steroid similar to cortisone that is used as an antiallergic, immunosuppressive, and anticancer drug and as an anti-inflammatory agent in the treatment of rheumatoid arthritis.

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