Olympic Chief: Zika Not Top Concern at Rio Games

sewage – n. waste material (such as human urine and feces) that is carried away from homes and other buildings in a system of pipes

impeachment – n. the act of charging a public official with a crime done in office

bioethicist – n. an expert in biology and medicine who understands the rules of good and bad behavior

birth defect – n. a problem, disease or fault contracted before birth that makes a baby not perfect