Dictionary.com
Thesaurus.com

rectum

American  
[rek-tuhm] / ˈrɛk təm /

noun

Anatomy.
  • rectums,
    plural
  • recta
    plural
  1. the comparatively straight, terminal section of the intestine, ending in the anus.


rectum British  
/ ˈrɛktəm /

noun

  1. the lower part of the alimentary canal, between the sigmoid flexure of the colon and the anus

"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

rectum Scientific  
/ rĕk′təm /
  • rectums
    plural
  1. The last section of the digestive tract, extending from the colon to the anus, in which feces is stored for elimination from the body.


rectum Cultural  
  1. The outermost portion of the large intestine. Feces are stored in the rectum until they are passed out of the body through the anus.


Other Word Forms

Noun Inflected Forms

Etymology

Origin of rectum

1535–45; < New Latin rēctum ( intestīnum ) the straight (intestine)

Vocabulary lists containing rectum

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Gastrointestinal cancers include cancers of the esophagus, stomach, and colon or rectum.

From Science Daily ● Jul. 14, 2026

You’re also at risk of developing hemorrhoids—swollen veins in the anus and lower rectum that can cause pain and bleeding—according to a study that came out last week.

From Slate ● Sep. 12, 2025

When he arrived to see what the birds were eating, he found a dead cow, its rectum and udders torn away — classic wolf kill.

From Los Angeles Times ● Apr. 21, 2025

Ulcerative colitis affects the innermost lining of the large intestine, also called the colon and rectum.

From Science Daily ● Jun. 3, 2024

The procedure wasn't effective because the rectum and large intestine absorbed few nutrients from the mixture, not enough to sustain a man.

From "Ambushed!" by Gail Jarrow

The vasa recta around it acts as the countercurrent exchanger.

From Textbooks ● Jun. 9, 2022

It is important to understand the difference between the glomerulus and the peritubular and vasa recta capillaries.

From Textbooks ● Jun. 19, 2013

In the vasa recta particularly, this rate of flow is important for two additional reasons.

From Textbooks ● Jun. 19, 2013

Movement of water into the peritubular capillaries and vasa recta will be influenced primarily by osmolarity and concentration gradients.

From Textbooks ● Jun. 19, 2013

So after Ascension Day I keep them recta an extra hour every Wednesday.

From Madame Bovary A Tale of Provincial Life by Gustave Flaubert

Wouldn’t we have died out from these mysterious “toxins”? Wouldn’t our rectums be different?

From The Guardian ● Jan. 9, 2018

At one institution, mice consistently developed prolapsed rectums and died two months after birth.

From Nature ● Jun. 9, 2015

Babies’ mouths and skin were swabbed immediately after birth, and their rectums were swabbed after their first bowel movement.

From US News ● Jun. 22, 2010

A new survey finds that babies born via cesarean section had markedly different bacteria on their skin, noses mouths and rectums than babies born vaginally.

From US News ● Jun. 22, 2010

Vocabulary.com logo
by dictionary.com

Join 14,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training