CHITIN
chitin
(noun) a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi
Source: WordNet® 3.1
Etymology
Noun
chitin (countable and uncountable, plural chitins)
(carbohydrate) 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.
Anagrams
• itchin'
Source: Wiktionary
Chi"tin, n. Etym: [See Chiton.] (Chem.)
Definition: A white amorphous horny substance forming the harder part of
the outer integument of insects, crustacea, and various other
invertebrates; entomolin.
Source: Webster’s Unabridged Dictionary 1913 Edition