acellular

adjective

acel·​lu·​lar (ˌ)ā-ˈsel-yə-lər How to pronounce acellular (audio)
1
: containing no cells
acellular vaccines
2
: not divided into cells : consisting of a single complex cell
used especially of protozoa and ciliates

Examples of acellular in a Sentence

Recent Examples on the Web Then, once the structure was built, the scientists removed the cadaver cells, leaving behind the new human acellular vessel (HAV), which mimics a real artery or vein. Roni Dengler, Discover Magazine, 12 Dec. 2019 Now there are no whole cells left, only the acellular compounds that were once in the foods. Anna Funk, Discover Magazine, 28 Sep. 2018 Researchers found that shots for children and teens between March and May 2020 were substantially lower for routine vaccinations, including for DTaP (diphtheria, tetanus and acellular pertussis), measles, and HPV, across all age groups, compared with the same three-month period in 2018 and 2019. Anchorage Daily News, 10 June 2021 Among children under 24 months old and children 2 to 6 years old, doses of DTaP (diphtheria, tetanus, and acellular pertussis) fell a median of almost 16 percent and 60 percent, respectively, across all jurisdictions, compared with the same period in 2018 and 2019. BostonGlobe.com, 10 June 2021 The new vessels, dubbed human acellular vessels (HAVs), are about 15 inches long with a quarter inch diameter. Roni Dengler, Discover Magazine, 28 Mar. 2019 And the more doses of the acellular vaccine, the higher the pertussis risk. Carrie Arnold, Discover Magazine, 23 May 2013 In the most recent school year, kindergartners had a 93.9% vaccination rate for measles, mumps and rubella (MMR), 93.6% for diphtheria, tetanus and acellular pertussis, and 93.6% for varicella. Virginia Langmaid, CNN, 21 Apr. 2022 The acellular vaccine has, however, lately turned out to provide strong protection for only a few years. Richard Conniff, Smithsonian Magazine, 24 Feb. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'acellular.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1857, in the meaning defined at sense 1

Time Traveler
The first known use of acellular was in 1857

Dictionary Entries Near acellular

Cite this Entry

“Acellular.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acellular. Accessed 15 Jul. 2024.

Kids Definition

acellular

adjective
acel·​lu·​lar (ˈ)ā-ˈsel-yə-lər How to pronounce acellular (audio)
: not made up of cells

Medical Definition

acellular

adjective
acel·​lu·​lar (ˈ)ā-ˈsel-yə-lər How to pronounce acellular (audio)
1
: containing no cells
acellular vaccines
2
: not divided into cells : consisting of a single complex cell
used especially of protozoans and ciliates
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