diphtheria

noun

diph·​the·​ria dif-ˈthir-ē-ə How to pronounce diphtheria (audio)
nonstandard
dip- How to pronounce diphtheria (audio)
: an acute febrile contagious disease typically marked by the formation of a false membrane especially in the throat and caused by a gram-positive bacterium (Corynebacterium diphtheriae) that produces a toxin causing inflammation of the heart and nervous system
diphtherial
dif-ˈthir-ē-əl How to pronounce diphtheria (audio)
 nonstandard  dip-
adjective
diphtheritic
ˌdif-thə-ˈri-tik How to pronounce diphtheria (audio)
 nonstandard  ˌdip-
adjective

Examples of diphtheria 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.
The vaccine was first developed during WWI, and has been widely available in a combination inoculation with tetanus and diphtheria for more than seven decades. New York Daily News Editorial Board, New York Daily News, 8 Dec. 2024 Under Ladapo, the state has actually been gaining on the nation as a whole in terms of flu shots for adults and holding its own on immunization for diphtheria, tetanus, and pertussis in toddlers. Daniel Engber, The Atlantic, 20 Nov. 2024 Tdap vaccine The Tdap (tetanus, diphtheria, pertussis) vaccine helps to protect against tetanus, diphtheria and pertussis. Melissa Rudy, Fox News, 1 Nov. 2024 As early as 2 months old, babies get a formulation called DTaP, which besides pertussis also protects against diphtheria and tetanus. Rong-Gong Lin Ii, Los Angeles Times, 22 Nov. 2024 See all Example Sentences for diphtheria 

Word History

Etymology

New Latin, from French diphthérie, from Greek diphthera leather; from the toughness of the false membrane

First Known Use

circa 1851, in the meaning defined above

Time Traveler
The first known use of diphtheria was circa 1851

Dictionary Entries Near diphtheria

Cite this Entry

“Diphtheria.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diphtheria. Accessed 23 Dec. 2024.

Kids Definition

diphtheria

noun
diph·​the·​ria dif-ˈthir-ē-ə How to pronounce diphtheria (audio) dip- How to pronounce diphtheria (audio)
: a contagious bacterial disease with fever in which the air passages become coated with a membranous layer that often obstructs breathing
diphtheritic adjective

Medical Definition

diphtheria

noun
diph·​the·​ria dif-ˈthir-ē-ə How to pronounce diphtheria (audio) dip- How to pronounce diphtheria (audio)
: an acute febrile contagious disease typically marked by the formation of a false membrane especially in the throat and caused by a bacterium of the genus Corynebacterium (C. diphtheriae) which produces a toxin causing inflammation of the heart and nervous system
diphtherial adjective

More from Merriam-Webster on diphtheria

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