malaria

noun

ma·​lar·​ia mə-ˈler-ē-ə How to pronounce malaria (audio)
1
a
: a human disease that is caused by sporozoan parasites (genus Plasmodium) in the red blood cells, is transmitted by the bite of anopheline mosquitoes, and is characterized by periodic attacks of chills and fever
b
: any of various diseases of birds and mammals caused by blood protozoans
2
archaic : air infected with a noxious substance capable of causing disease
especially : miasma
malarial adjective
malarious adjective

Examples of malaria in a Sentence

Recent Examples on the Web
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The top officials estimated that the casualties would include up to 166,000 deaths from malaria, a 30% rise in new tuberculosis cases, 200,000 children paralyzed by polio over the next decade and more than a million children left untreated for severe malnutrition. Alex Knapp, Forbes, 5 Mar. 2025 One million children will go untreated for severe malnutrition, up to 166,000 people will die from malaria and 200,000 more children will be paralyzed by polio over the next decade, the memos estimated. Brett Murphy, ProPublica, 3 Mar. 2025 The Ministry of Health was also forced to terminate the contract of 5,000 workers across the country focused on HIV and malaria prevention, vaccinations and helping vulnerable women deal with the trauma of war. Sam Mednick, arkansasonline.com, 2 Mar. 2025 The programs being kept include food and lifesaving assistance for HIV, TB and malaria. Brittney Melton, NPR, 27 Feb. 2025 See All Example Sentences for malaria

Word History

Etymology

Italian, from mala aria bad air

First Known Use

1740, in the meaning defined at sense 2

Time Traveler
The first known use of malaria was in 1740

Browse Nearby Words

Cite this Entry

“Malaria.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/malaria. Accessed 9 Mar. 2025.

Kids Definition

malaria

noun
ma·​lar·​ia mə-ˈler-ē-ə How to pronounce malaria (audio)
: a disease caused by protozoan parasites in the red blood cells, passed from one individual to another by the bite of mosquitoes, and marked by periodic attacks of chills and fever
malarial adjective

Medical Definition

malaria

noun
ma·​lar·​ia mə-ˈler-ē-ə How to pronounce malaria (audio)
1
: an acute or chronic disease caused by the presence of sporozoan parasites of the genus Plasmodium in the red blood cells, transmitted from an infected to an uninfected individual by the bite of anopheline mosquitoes, and characterized by periodic attacks of chills and fever that coincide with mass destruction of blood cells and the release of toxic substances by the parasite at the end of each reproductive cycle
malaria remains the greatest single cause of debilitation and death throughout the worldThe Journal of the American Medical Association
see falciparum malaria, vivax malaria
2
: any of various diseases of birds and mammals that are more or less similar to malaria of human beings and are caused by blood protozoans

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