• expert in a particular branch of science; man of science, researcher
• a scientist is an expert who does work in one of the sciences.
• famous scientist
• naturalist, one who studies animals and plants; expert in natural science
• person who studies political science; scientist who specializes and studies the structure and methods of governments and political organizations
• a political scientist is someone who studies and lectures on political science.
• (slang) brainiac, very intelligent and brilliant person, genius
• a social scientist is a person who studies or teaches social science.