The difference between Armour and Chitin
When used as nouns, armour means a protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces, whereas chitin means a complex polysaccharide, a polymer of n-acetylglucosamine, found in the exoskeletons of arthropods and in the cell walls of fungi.
Armour is also verb with the meaning: to equip something with armour or a protective coating or hardening.
check bellow for the other definitions of Armour and Chitin
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Armour as a noun (uncountable):
A protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces.
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Armour as a noun (uncountable):
A natural form of this kind of protection on an animal's body.
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Armour as a noun (uncountable):
Metal plate, protecting a ship, military vehicle, or aircraft.
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Armour as a noun (countable):
A tank, or other heavy mobile assault vehicle.
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Armour as a noun (military, uncountable):
A military formation consisting primarily of tanks or other armoured fighting vehicles, collectively.
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Armour as a noun (hydrology, uncountable):
The naturally occurring surface of pebbles, rocks or boulders that line the bed of a waterway or beach and provide protection against erosion.
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Armour as a verb (transitive):
To equip something with armour or a protective coating or hardening.
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Armour as a verb (transitive):
To provide something with an analogous form of protection.
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Chitin as a noun (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.