mast-

mast-

variant of masto- before a vowel: mastectomy.
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World English Dictionary
mast-
 
combining form
a variant of masto-

masto- or (before a vowel) mast-
 
combining form
indicating the breast, mammary glands, or something resembling a breast or nipple: mastodon; mastoid
 
[from Greek mastos breast]
 
mast- or (before a vowel) mast-
 
combining form
 
[from Greek mastos breast]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

mast- pref.
Variant of masto-.

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