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• tome
  tome

  noun

  a book, especially a very heavy, large, or learned book.
• -tome
  -tome

  a combining form with the meanings “cutting instrument” (microtome; osteotome ), “segment, somite” (sclerotome ), used in the formation of compound words.

tome

¹ American  

[tohm] / toʊm /

noun

1. a book, especially a very heavy, large, or learned book.

2. a volume forming a part of a larger work.

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-tome ² American  

1. a combining form with the meanings “cutting instrument” (microtome; osteotome ), “segment, somite” (sclerotome ), used in the formation of compound words.

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tome ¹ British  

/ təʊm /

noun

1. a large weighty book

2. one of the several volumes of a work

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-tome ² British  

combining form

1. indicating an instrument for cutting

   osteotome

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Usage

What does -tome mean? The combining form -tome is used like a suffix to mean “cutting instrument” as well as a “segment, somite.” A somite is a scientific term designating body segments in animals like worms or segments of a developing embryo. The form -tome is used in some scientific and medical terms, especially in anatomy and surgery. It comes from the Greek tomḗ, meaning “a cutting,” and tómos, “a cut, slice.”The Greek root tómos, which can also mean “piece, roll of paper, or book,” is also the source of the word tome. Crack open the history of tome at our entry for the word. Also related to tómos is atom. What’s the big idea behind atoms and cutting? Find out in our Origin section for this term. Related to -tome are the combining forms -ectomy, -tomous, -tomy, and tomo-. Slice into their specific meanings at our Words That Use articles for the forms.

Etymology

Origin of tome¹

First recorded in 1510–20; from French, from Latin tomus, from Greek tómos “slice, piece, roll of paper, book,” akin to témnein “to cut”

Origin of -tome²

Combining form representing Greek tomḗ a cutting; tómos a cut, slice; -tomon (neuter), -tomos (masculine) -cutting (adj.)

Explanation

A tome is a large book. If you're pre-med, chances are you're going to have one heck of a tome for your biology class. Tome is often used to refer to a book that is not only really large but also unusually important. If you generally carry more than one tome to class, invest in a bag with wheels so you don't hurt your back. A tome is big and heavy. "Wow! This tome weighs a ton!" Whatever you do, don't leave your tome at home — you'll wind up in detention! You can also use tome sarcastically to describe a book that clearly isn't large or important. But sarcasm is for advanced users only.

Example Sentences

“Our focus on revenue quality yielded solid results as U.S. revenue per piece grew by 9.8% in the third quarter,” CEO Carol Tome says on a call with analysts.

From The Wall Street Journal • Oct. 28, 2025

Leon boycotted the 2023 World Cup and was not part of the set-up under Vilda's successor Tome.

From Barron's • Oct. 17, 2025

Spain's women's national team have parted ways with head coach Montse Tome and named Sonia Bermudez as her replacement.

From BBC • Aug. 11, 2025

Journalists and supporters in Spain are widely in favour of the decision to let Tome go, given she was assistant manager to Vilda and part of the previously poor culture.

From BBC • Aug. 11, 2025

In his early years, Clare had studied the Tome every night, drawing comfort from the guidance of Ushers past.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman

Related Words

• magnum opus
• novel
• opus
• publication
• reference book
• textbook