peptidoglycan

noun

pep·​ti·​do·​gly·​can ˌpep-tə-dō-ˈglī-ˌkan How to pronounce peptidoglycan (audio)
: a polymer that is composed of polysaccharide and peptide chains and is found especially in bacterial cell walls

called also mucopeptide, murein

Example Sentences

Recent Examples on the Web That thick layer of peptidoglycan helps hold in a purple dye called crystal violet. Beth Mole, Ars Technica, 16 Aug. 2019 By contrast, cells with more complex cell walls consisting of a relatively thin layer of peptidoglycan plus an outer membrane don’t hold in crystal violet as well. Beth Mole, Ars Technica, 16 Aug. 2019 The authors think that the peptidoglycan remains in synovial fluid after the pathogen is gone. Linda Carroll, NBC News, 18 June 2019

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

Word History

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of peptidoglycan was in 1966

Dictionary Entries Near peptidoglycan

Cite this Entry

“Peptidoglycan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peptidoglycan. Accessed 31 Jan. 2023.

Medical Definition

peptidoglycan

noun
pep·​ti·​do·​gly·​can ˌpep-təd-ō-ˈglī-ˌkan How to pronounce peptidoglycan (audio)
: a polymer that is composed of polysaccharide and peptide chains and is found especially in bacterial cell walls

called also mucopeptide, murein

More from Merriam-Webster on peptidoglycan

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