sep·​tum | \ ˈsep-təm How to pronounce septum (audio) \
plural septa\ ˈsep-​tə How to pronounce septum (audio) \

Definition of septum

: a dividing wall or membrane especially between bodily spaces or masses of soft tissue — compare dissepiment

Examples of septum in a Sentence

Recent Examples on the Web Among these: preschool popularity, a septum piercing, low-key internet fame, COVID. Andrea Park, Marie Claire, "The 26 Best Memes of 2020," 22 Dec. 2020 In the spring of 1983, Mike had surgery for a nasal septum reconstruction but never seemed to recover. Peggy Fletcher Stack, The Salt Lake Tribune, "‘If there is a heaven, my father is in it’ — Son discovers his dad, the first person to die of AIDS in Utah," 29 Nov. 2020 Twigs’s mastery of forms of movement, as well as her status as a fashion icon — with her septum ring, baby hairs and neo-gothic style — has at times outshone her music. Emily J. Lordi Photographs By Liz Johnson Artur, New York Times, "FKA Twigs," 19 Oct. 2020 In an apartment in Gaza, a model with a septum piercing wears Meera Adnan’s ’80s-style looks: an oversized jacket with puffy sleeves and extreme high-waist trousers with shell buttons. Liana Satenstein, Vogue, "This Gaza-Based Designer Is Creating Suiting With a Personal History," 13 Oct. 2020 The ultra-private artist also gave us major fashion inspiration in the new post, teaming a leopard-print button up with a leather jacket, round sunglasses and a septum ring for the ultimate fall look. Hanna Flanagan,, "Tom Cruise and Nicole Kidman's 27-Year-Old Daughter Bella Shares Rare Selfie Debuting Blue Hair," 22 Sep. 2020 Alison Galvan and her husband, Danny, have been trying to get pregnant for 2½ years, a process that has involved numerous doctors, many office visits and two surgeries to remove a muscle septum in her uterus. Richard Marini,, "Women struggling with infertility turn to social media platforms like Facebook and Instagram for support," 14 Aug. 2020 With septate uterus, the most common anomaly, the organ looks normal from the outside, but a muscular or fibrous septum divides the uterine cavity into two chambers. Katherine Hobson, New York Times, "Know Your Uterus," 18 Apr. 2020 Michael did not suffer any brain damage, but he was diagnosed with a cardiac fibroma that had latched itself to the septum in the left chamber of his heart, according to his GoFundMe. Rachel Desantis,, "Baby with Rare Heart Tumor Awoke from Coma Smiling — and Now He Needs Life-Saving Surgery," 25 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'septum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of septum

1578, in the meaning defined above

History and Etymology for septum

New Latin, from Latin saeptum enclosure, fence, wall, from saepire to fence in, from saepes fence, hedge

Keep scrolling for more

Learn More about septum

Statistics for septum

Last Updated

20 Jan 2021

Cite this Entry

“Septum.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Keep scrolling for more

More Definitions for septum


sep·​tum | \ ˈsep-təm How to pronounce septum (audio) \
plural septa\ -​tə How to pronounce septum (audio) \

Medical Definition of septum

: a dividing wall or membrane especially between bodily spaces or masses of soft tissue: as

More from Merriam-Webster on septum Encyclopedia article about septum

Comments on septum

What made you want to look up septum? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!