se·​rous ˈsir-əs How to pronounce serous (audio)
: of, relating to, or resembling serum
especially : of thin watery constitution
a serous exudate
see also serous fluid

Examples of serous in a Sentence

Recent Examples on the Web Molten sulfur can cause serous thermal burns upon contact and will form toxic and flammable gases when reacting to hydrocarbon, a compound at the heart of fossil fuels. Erick Mendoza, NBC News, 25 June 2023 Her case was complicated by a serous choroidal detachment, an abnormal accumulation of fluid, which ultimately led to vision loss in the left eye. Janelle Chavez, CNN, 24 Mar. 2023 Google corrected me: central serous. Liane Kupferberg Carter, Longreads, 10 Aug. 2020 A year after his fall, Graham was diagnosed with endometrial serous carcinoma, a rare and aggressive form of uterine cancer. Katy Waldman, The New Yorker, 1 Jan. 2023 Musk offered $44 billion for the platform in April, which at the time felt like a deliciously grandiose rich-guy flex, rather than a serous bid. Raven Smith, Vogue, 9 Nov. 2022 Zachary said that there are serous gardeners, or those who like to see the works of other serious gardeners, who travel the world specifically for such tours. cleveland, 4 June 2022 Exudative or serous retinal detachment (SRD) is rare type of retinal detachment, which occurs when fluid accumulates under your retina and pushes it away from the blood vessels. Bruce Y. Lee, Forbes, 9 Apr. 2022 Elevated cortisol also increases the risk of central serous chorioretinopathy (CSCR), Rosenthal said. Washington Post, 17 Dec. 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'serous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Middle English cerose, serose, serous, borrowed from Medieval Latin serōsus, from Latin serum "whey, wheylike fluid" + -ōsus -ous — more at serum entry 1

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of serous was in the 15th century

Dictionary Entries Near serous

Cite this Entry

“Serous.” Dictionary, Merriam-Webster, Accessed 28 Sep. 2023.

Medical Definition


se·​rous ˈsir-əs How to pronounce serous (audio)
: of, relating to, producing, or resembling serum
especially : having a thin watery constitution
a serous exudate

More from Merriam-Webster on serous

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