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a combining form meaning “stomach,” used in the formation of compound words: gastrology.
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Which sentence is correct?
Also especially before a vowel, gastr-.

Origin of gastro-

<Greek, combining form of gastḗr
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023


What does gastro- mean?

Gastro- is a combining form used like a prefix meaning “stomach.” It is often used in medical terms, particularly in anatomy and pathology.

Gastro- comes from the Greek gastḗr, meaning “stomach” or “belly.”

What are variants of gastro-?

When combined with words or word elements that begin with a vowel, gastro- becomes gastr-, as in gastralgia.

Examples of gastro-

One word you may have encountered that uses the combining form gastro- is gastrology, “the study of the structure, functions, and diseases of the stomach.”

We know gastro- means “stomach,” so what does the -logy portion of the word mean? That’s right, -logy refers to “science,” ultimately from the Greek lógos, meaning “word, thought” among many other senses. Gastrology literally translates to “stomach science.”

What are some words that use the combining form gastro-?

What are some other forms that gastro- may be commonly confused with?

The gastro- in the word gastropub, a bar that serves good food and high-quality drinks, is actually short from gastronomy, “the art or science of good eating.” Related is gastronome, “a connoisseur of good food.”

Break it down!

Gastropod is the name for a type of mollusks, including snails and slugs. The combining form -pod means “one having a foot.” What, then, is the literal translation of the name gastropod?

How to use gastro- in a sentence

British Dictionary definitions for gastro-


often before a vowel gastr-

combining form
stomachgastroenteritis; gastritis

Word Origin for gastro-

from Greek gastēr
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