Final answer:
Psoriasis is a skin disorder characterized by plaques covered in silvery scales.
Step-by-step explanation:
The skin disorder characterized by plaques covered in silvery scales is called psoriasis. Psoriasis is a chronic autoimmune condition that affects the skin, causing cells to build up rapidly on the surface. The excessive production of skin cells results in the formation of red, raised plaques covered with silvery scales.
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