hematologic death syndrome /hem′ətōloj″ik/ , a group of clinical signs and symptoms of radiation damage to the blood cells. The condition is characterized by nausea, vomiting, fever, diarrhea, infections, anemia, leukopenia, and hemorrhage. It can result from exposure to a dose of 200 to 1000 rad. The mean survival time for a person with hematologic death syndrome is estimated at between 10 and 60 days.