leprosy

noun

lep·​ro·​sy ˈle-prə-sē How to pronounce leprosy (audio)
1
: a chronic infectious disease caused by a mycobacterium (Mycobacterium leprae) affecting especially the skin and peripheral nerves and characterized by the formation of nodules or macules that enlarge and spread accompanied by loss of sensation with eventual paralysis, wasting of muscle, and production of deformities

called also Hansen's disease

2
: a morally or spiritually harmful influence
leprotic adjective

Examples of leprosy in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Most people are immune to leprosy and there’s an effective combination of antibiotic treatment for those who do contract it. Allison Futterman, Discover Magazine, 10 Sep. 2024 These are known to infect mycobacteria, a pathogenic species that causes leprosy, tuberculosis, and chronic lung infections, among other diseases. Laura Baisas, Popular Science, 9 Oct. 2024 Mycobacterium leprae causes the bacterial infection, leprosy, and primarily affects the nerves and skin. Allison Futterman, Discover Magazine, 10 Sep. 2024 Inskip and her colleagues zeroed in on the medieval city of Winchester, which had not only skinners, tailors, and furriers, but also a hospital for leprosy patients. Bysean Cummings, science.org, 7 Aug. 2024 See all Example Sentences for leprosy 

Word History

Etymology

Middle English lepruse, from leprous

First Known Use

15th century, in the meaning defined at sense 1

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

Dictionary Entries Near leprosy

Cite this Entry

“Leprosy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leprosy. Accessed 22 Nov. 2024.

Kids Definition

leprosy

noun
lep·​ro·​sy ˈlep-rə-sē How to pronounce leprosy (audio)
: a disease caused by a bacterium and marked by slow-growing spreading swellings accompanied by loss of sensation, wasting away of muscles, and by deformities

called also Hansen's disease

Medical Definition

leprosy

noun
lep·​ro·​sy ˈlep-rə-sē How to pronounce leprosy (audio)
plural leprosies
: a chronic infectious disease that is caused by a mycobacterium (Mycobacterium leprae), affects especially the skin and peripheral nerves, and is characterized by the formation of nodules or macules that enlarge and spread and are accompanied by loss of sensation with eventual paralysis, wasting of muscle, and production of deformities
About 12 million people worldwide have leprosy, a disfiguring, chronic infection that damages nerves, skin, eyes, and mucous membranes.Harvard Health Letter
The good news is that leprosy is relatively easy to diagnose and cure. It is caused by the microbe Mycobacterium leprae, which produces telltale symptoms of enlarged nerves and light-coloured patches of numb skin on a patient's face or extremities.Bryn Nelson, New Scientist
Leprosy is actually the least infectious of the major communicable diseases.Sandra Dallas, Business Week
Leprosy … is progressive and causes the growth of widely distributed lumps on the skin and thickening of the skin and nerves. Severe cases are characterized by muscle weakness and paralysis.Insight

called also hansenosis, Hansen's disease, lepra

see lepromatous leprosy, tuberculoid leprosy

More from Merriam-Webster on leprosy

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