-tome a combining form with the meanings “cutting instrument” (microtome; osteotome ), “segment, somite” (sclerotome ), used in the formation of compound words.
Origin: comb. form repr. Gk
tom a cutting;
tómos a cut, slice;
-tomon (neut.),
-tomos (masc.) -cutting (adj.)
tome One of the books in a work of several volumes.
A book, especially a large or scholarly one.
tomus , from Greek tomos , a cutting, section , from temnein , to cut ; see tem- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary
-tome suff.
Part; area; segment: dermatome.
Cutting instrument: microtome.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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[tohm] 
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