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Definition of chitin in English: chitinnoun ˈkʌɪtɪnˈkaɪtn mass nounBiochemistry A fibrous substance consisting of polysaccharides, which is the major constituent in the exoskeleton of arthropods and the cell walls of fungi. 〔生化〕几丁质，壳多糖，甲壳质 Example sentencesExamples - Arthropods have a stiff cuticle made largely of chitin and proteins, forming an exoskeleton that may or may not be further stiffened with calcium carbonate.
- There are a few other animal carbohydrates, notably chitin, the substance which constitutes the hard outer casing of insects and crustaceans.
- Chitinases are hydrolytic enzymes that catalyze the degradation of chitin, a major component of fungal cell walls.
- Finally, like other fungi, chytrids have chitin strengthening their cell walls, and one subgroup have cellulose as well, a trait unique among living fungi.
- Despite their obvious differences, both mollusc shells and arthropod cuticle contain chitin.
Derivativesadjective Biochemistry But this time… ‘Dancer held up her elongated forearms, staring at her pale, chitinous claws.’ Example sentencesExamples - Eurypterid cuticle was chitinous and of varying thickness, but generally very thin, and preserved specimens (which were probably mostly molted skins) are usually crushed.
- A chitinous exoskeleton is not rigid enough to support a mass of that size.
- In addition, examination of the chitinous cuticle that covers the surface of the infundibulum reveals a remarkable array of tiny pegs or ‘denticles’.
- They are the earliest well-known complex three-dimensional trace fossils; mostly small, chitinous, calcareous, and phosphatic elements of problematic affinity.
OriginMid 19th century: from French chitine, formed irregularly from Greek khitōn (see chiton). Definition of chitin in US English: chitinnounˈkītnˈkaɪtn Biochemistry A fibrous substance consisting of polysaccharides and forming the major constituent in the exoskeleton of arthropods and the cell walls of fungi. 〔生化〕几丁质，壳多糖，甲壳质 Example sentencesExamples - Finally, like other fungi, chytrids have chitin strengthening their cell walls, and one subgroup have cellulose as well, a trait unique among living fungi.
- Chitinases are hydrolytic enzymes that catalyze the degradation of chitin, a major component of fungal cell walls.
- Arthropods have a stiff cuticle made largely of chitin and proteins, forming an exoskeleton that may or may not be further stiffened with calcium carbonate.
- There are a few other animal carbohydrates, notably chitin, the substance which constitutes the hard outer casing of insects and crustaceans.
- Despite their obvious differences, both mollusc shells and arthropod cuticle contain chitin.
OriginMid 19th century: from French chitine, formed irregularly from Greek khitōn (see chiton). |