Final answer:
Psoriasis is a chronic, inflammatory skin disorder characterized by silvery-white scaly plaques or patches with defined borders and reddened skin.
Step-by-step explanation:
A chronic, inflammatory skin disorder characterized by silvery-white scaly plaques or patches with defined borders and reddened skin is called psoriasis. Psoriasis is a common autoimmune condition that affects the skin, causing rapid cell turnover and resulting in the formation of thick, scaly patches.
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