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Supposedly vs. Supposably


variant of ad- before t: attend. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Origin and History for at-

assimilated form of ad- "to, toward, before" before stems beginning in -t-; see ad-.

Online Etymology Dictionary, © 2010 Douglas Harper
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at- in Medicine

at- pref.
Variant of ad-.

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