mononucleosis
noun
mono·nu·cle·o·sis ˌmä-nə-ˌnü-klē-ˈō-səs 
-ˌnyü-
: an abnormal increase of mononuclear white blood cells in the blood
specifically : infectious mononucleosis
Example Sentences
Recent Examples on the Web The virus can cause mononucleosis and, according to some researchers, Chronic Fatigue Syndrome—which, similar to long COVID, includes symptoms like fatigue, concentration problems, and headaches. 
Erin Prater, Fortune, 3 July 2022 The Epstein-Barr virus, which causes mononucleosis, puts those with it at a higher risk for multiple sclerosis down the road, a recent study found. Erin Prater, Fortune, 8 May 2022 Mitchell, recovering from mononucleosis, is transferring from Michigan to Florida. David Woods, The Indianapolis Star, 25 Apr. 2022 But the timing seemed odd: I’d been diagnosed with mononucleosis a few months before and as a result had been forced to stop exercising. Alex Hutchinson, Outside Online, 15 May 2020 In one pioneering study this January, researchers at Harvard found a causal link between Epstein-Barr virus (or EBV, which most people contract, and which gives a few unlucky individuals mononucleosis) and multiple sclerosis (MS). USA Today, 23 May 2022 In spring training last season, Belt was coming off bouts with mononucleosis and COVID-19 and had just nine plate appearances, going 1-for-6 with three walks. John Shea, San Francisco Chronicle, 30 Mar. 2022 In September 2020, Elujay was completely isolated (aside from the company of his mini Dachshund) and bedridden for months, thanks to a gruesome combination of COVID-19 and mononucleosis. Neena Rouhani, Billboard, 21 Jan. 2022 Richardson, who missed the final five games of the season due to mononucleosis, shot 45.4% from the field, including 38.8% from three, and 77.2% from the free throw line en route to a career-high in scoring and rebounding this season. oregonlive, 1 June 2022 See More
Erin Prater, Fortune, 3 July 2022 The Epstein-Barr virus, which causes mononucleosis, puts those with it at a higher risk for multiple sclerosis down the road, a recent study found. Erin Prater, Fortune, 8 May 2022 Mitchell, recovering from mononucleosis, is transferring from Michigan to Florida. David Woods, The Indianapolis Star, 25 Apr. 2022 But the timing seemed odd: I’d been diagnosed with mononucleosis a few months before and as a result had been forced to stop exercising. Alex Hutchinson, Outside Online, 15 May 2020 In one pioneering study this January, researchers at Harvard found a causal link between Epstein-Barr virus (or EBV, which most people contract, and which gives a few unlucky individuals mononucleosis) and multiple sclerosis (MS). USA Today, 23 May 2022 In spring training last season, Belt was coming off bouts with mononucleosis and COVID-19 and had just nine plate appearances, going 1-for-6 with three walks. John Shea, San Francisco Chronicle, 30 Mar. 2022 In September 2020, Elujay was completely isolated (aside from the company of his mini Dachshund) and bedridden for months, thanks to a gruesome combination of COVID-19 and mononucleosis. Neena Rouhani, Billboard, 21 Jan. 2022 Richardson, who missed the final five games of the season due to mononucleosis, shot 45.4% from the field, including 38.8% from three, and 77.2% from the free throw line en route to a career-high in scoring and rebounding this season. oregonlive, 1 June 2022 See More Word History
Etymology
New Latin, from International Scientific Vocabulary mononuclear + New Latin -osis
First Known Use
1907, in the meaning defined above
Phrases Containing mononucleosis
Medical Definition
mononucleosis
noun
mono·nu·cle·o·sis -ˌn(y)ü-klē-ˈō-səs
: an abnormal increase of mononuclear white blood cells in the blood
specifically : infectious mononucleosis