He identified the pathways that regulated wakefulness and sleep onset by studying the parts of the brain that were affected by the disease and the consequences it had on the circadian rhythm.
jeopardize definition, meaning, what is jeopardize: to put something such as a plan or system in danger of being harmed or damaged: . Learn more.
Definition of fraud for English Language Learners. : 1  the crime of using dishonest methods to take something valuable from another person. : 2  a person who pretends to be what he or she is not in order to trick people. : 3  a copy of something that is meant to look like the real thing in order to trick people.