**I'm sorry for the confusion, but 'Nevada' is not a medical term.** It is a geographical location, specifically a state in the southwestern United States. If you have any medical terms or concepts you would like me to define or explain, please let me know!

I'm sorry for any confusion, but "California" is a place, specifically a state on the western coast of the United States, and not a medical term or concept. Therefore, it doesn't have a medical definition.