researcherre‧search‧er /rɪˈsɜːtʃə $ -ˈsɜːrtʃər/ ●●○ AWL noun [countable] 
someone who studies a subject in detail in order to discover new facts or test new ideas: 
medical researchers Researchers have found links between stress and heart disease.
someone who studies a subject in detail in order to discover new facts or test new ideas: medical researchers Researchers have found links between stress and heart disease.