Chitin

//ˈkaɪtɪn// noun

Definitions

Noun
  1. 1
    A complex polysaccharide, a polymer of N-acetylglucosamine, found in the exoskeletons of arthropods and in the cell walls of fungi; thought to be responsible for some forms of asthma in humans. countable, uncountable

    "Chitin usually occurs throughout Invertebrates in the form of an investment to the outermost cellular layer or ectoderm."

  2. 2
    a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi wordnet

Etymology

From French chitine, from Latin chitōn (“mollusk”), from Ancient Greek χιτών (khitṓn). See also chiton.

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