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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  
/ rĕktəm /
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:

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

A Spanish-speaking detainee at California’s McFarland immigrant detention facility was struggling in May 2023 to tell a doctor, in broken English, that he sometimes bled from his rectum.

From Los Angeles Times Sep. 5, 2024

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

From Science Daily Jun. 3, 2024

In severe cases, patients may require surgical removal of all or part of the rectum.

From Science Daily Apr. 24, 2024

Strings of them ran over the surfaces of the liver, diaphragm, intestine, appendix, rectum, and heart.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot

The vasa recta around it acts as the countercurrent exchanger.

From Textbooks Jun. 9, 2022

Solutes and water recovered from these loops are returned to the circulation by way of the vasa recta.

From Textbooks Jun. 19, 2013

The descending and ascending loop and vasa recta form a countercurrent multiplier system to increase Na+ concentration in the kidney medulla.

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 Flaubert, Gustave

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

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