intestinal

adjective

in·​tes·​ti·​nal in-ˈte-stə-nᵊl 

-ˈtes(t)-nəl,

-ˈte-sᵊn-əl,

 British often  ˌin-(ˌ)te-ˈstī-nᵊl

1

: affecting, occurring, or living in the intestine

2

: of, relating to, or being the intestine

intestinally adverb

Examples of intestinal in a Sentence

Recent Examples on the Web

Extra-intestinal symptoms like fatigue, headache and muscle pain are common, but there’s still no evidence that gluten directly harms the nervous system in these cases. —New Atlas, 24 Oct. 2025

Other animal studies suggest that collagen from marine (fish) sources could worsen ulcerative colitis by increasing intestinal inflammation and disrupting the balance of bacteria in the gut. —Devineé Lingo, Health, 23 Oct. 2025

Studies in animal models have also shown that oleic acid, a fatty acid found in olive oil, can enhance the function of the intestinal barrier by increasing the levels of beneficial bacteria in the gut, specifically Bifidobacteria. —Angelica Bottaro, Verywell Health, 22 Oct. 2025

According to the team, this kind of work offers a proof-of-concept for using qPCR to identify intestinal parasites of past human populations. —Laura Baisas, Popular Science, 22 Oct. 2025

Word History

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing intestinal

• intestinal fortitude

Rhymes for intestinal

• gastrointestinal

Kids Definition

intestinal

adjective

in·​tes·​ti·​nal in-ˈtes-tən-ᵊl 

1

: of or relating to the intestine

2

: affecting or occurring in the intestine

intestinally

-ē

adverb

Medical Definition

intestinal

adjective

in·​tes·​ti·​nal

in-ˈtes-tən-ᵊl, -ˈtes(t)-nəl, -ˈtes-ᵊn-əl, British often ˌin-(ˌ)tes-ˈtīn-ᵊl

1

a

: affecting or occurring in the intestine

intestinal digestion

intestinal catarrh

b

: living in the intestine

the intestinal flora

an intestinal worm

2

: of, relating to, or being the intestine

the intestinal canal

intestinally

-ē 

adverb