in·​tra·​mus·​cu·​lar ˌin-trə-ˈmə-skyə-lər How to pronounce intramuscular (audio)
: situated in, occurring in, or administered by entering a muscle
an intramuscular injection
intramuscularly adverb

Example Sentences

Recent Examples on the Web The ‘intramuscular’ route of transmission proved remarkably effective in slowing transmission of the disease and preventing deaths from the virus, allowing much of the world to slowly re-emerge from pandemic lockdowns. Grady Mcgregor, Fortune, 17 Sep. 2022 Last year researchers at the National Institutes of Health conducted a side-by-side comparison of intranasal and intramuscular delivery of the Oxford-AstraZeneca vaccine. Marla Broadfoot, Scientific American, 3 May 2022 Other nasal spray vaccines have gained traction around the world because of their effectiveness at curbing contagion and their ease of transportation when compared to traditional intramuscular injection vaccine. Sophie Mellor, Fortune, 11 Oct. 2022 However, some monoclonal antibodies, such as Evusheld, are administered via an intramuscular injection. William A. Haseltine, Forbes, 5 Oct. 2022 It should be noted that in that trial, the fractional doses were administered by intramuscular injections, not intradermal. Helen Branswell, STAT, 6 Sep. 2022 Most routine vaccinations are given as intramuscular or subcutaneous shots, which go deeper. Cheyenne Haslett, ABC News, 9 Aug. 2022 More recently, the influenza vaccine against the H1N1 strain that caused a pandemic in 2009 was tested intradermally in many research studies and was shown to be just as effective at one-fifth the dose of the intramuscular shot. Cheyenne Haslett, ABC News, 9 Aug. 2022 The vaccine is licensed as a two-dose product, with the doses administered via intramuscular injection 28 days apart. Helen Branswell, STAT, 7 Aug. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'intramuscular.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


International Scientific Vocabulary

First Known Use

1874, in the meaning defined above

Time Traveler
The first known use of intramuscular was in 1874

Dictionary Entries Near intramuscular

Cite this Entry

“Intramuscular.” Dictionary, Merriam-Webster, Accessed 3 Dec. 2022.

Kids Definition



in·​tra·​mus·​cu·​lar ˌin-trə-ˈməs-kyə-lər How to pronounce intramuscular (audio)
: located in, occurring in, or injected into a muscle

Medical Definition



in·​tra·​mus·​cu·​lar -ˈməs-kyə-lər How to pronounce intramuscular (audio)
: situated within, occurring within, or administered by entering a muscle
intramuscular fat
an intramuscular injection
intramuscularly adverb

More from Merriam-Webster on intramuscular

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