e.g. The penumbra of financial scandal has denigrated the president's reputation.
e.g. The day of the solar eclipse, we all left our offices with our viewing devices to stare at the sky in hope of seeing the penumbra.
e.g. Time is brain in stroke: get to the hospital as soon as you suspect one, for a good radiographic image of the ischemic penumbra.
e.g. The radiologist was concerned about an area of penumbra on the radiograph, and therefore asked to have the whole series repeated before the patient was allowed to leave the cancer center.
e.g. The 'penumbra' is a very specific concept in U.S. constitutional law, defining a group of rights derived by implication from other rights specifically stated in the Bill of Rights.
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