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(skrēn)

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[Fr. escren]

1. To determine the presence of a disease or its characteristics in a broad community or a selected group.
2. A structure or substance used to protect, guard, or shield from a damaging influence such as x-rays, ultraviolet light, or insects.
3. A system used to select or reject personnel.
4. In psychiatry, the blocking of one memory with another.

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