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psf
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psi (1)
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psi particle
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psoriasis
pso·ri·a·sis [ sə r əssiss ]


noun 
Definition:
 
skin disease: a skin disease usually marked by red scaly patches
[Late 17th century. Via Latin, "scurvy, mange" < Greek psōriasis "itching" < psōra "itch, mange"]

pso·ri·at·ic [ sàwree áttik ] adjective
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