chitin

noun

chi·​tin ˈkī-tᵊn How to pronounce chitin (audio)
: a horny polysaccharide (C8H13NO5)n that forms part of the hard outer integument especially of insects, arachnids, and crustaceans
chitinous
ˈkī-tᵊn-əs How to pronounce chitin (audio)
ˈkīt-nəs
adjective

Examples of chitin 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.
Researchers developed a cheap and effective sponge-like filter to remove microplastics from water using cellulose fibers from cotton and chitin from squid exoskeletons. Alex Knapp, Forbes, 6 Dec. 2024 The reason behind this practice is that worm castings contain an enzyme known as chitinase that breaks down chitin, the major constituent in the exoskeleton of many insects, including whiteflies, aphids, and leaf miners, as well as spider mites. Joshua Siskin, Orange County Register, 10 Aug. 2024 Chitons–the hard spines and bristles in some modern mollusks–are made of the mineral calcium carbonate instead of the organic chitin that is in Shishania. Laura Baisas, Popular Science, 1 Aug. 2024 The insects' exoskeletons are made from a substance called chitin, which is fiber-like and has some prebiotic properties; this can improve animals' digestive health, Liesch explained. Claire Reid, Journal Sentinel, 22 May 2024 See all Example Sentences for chitin 

Word History

Etymology

French chitine, from Greek chitōn

First Known Use

circa 1839, in the meaning defined above

Time Traveler
The first known use of chitin was circa 1839

Dictionary Entries Near chitin

Cite this Entry

“Chitin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chitin. Accessed 17 Dec. 2024.

Kids Definition

chitin

noun
chi·​tin ˈkīt-ᵊn How to pronounce chitin (audio)
: a horny substance that forms part of the hard outer body covering especially of insects and crustaceans
chitinous
ˈkīt-ᵊn-əs How to pronounce chitin (audio)
ˈkīt-nəs
adjective

Medical Definition

chitin

noun
chi·​tin ˈkīt-ᵊn How to pronounce chitin (audio)
: a horny polysaccharide that forms part of the hard outer integument especially of insects, arachnids, and crustaceans
chitinous adjective

More from Merriam-Webster on chitin

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