researcher

noun

1. One who researches.

   “Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.”

   “The Amazon is larger than the next two largest rainforests combined, according to Rhett Butler, a rainforest researcher and the CEO of Mongabay.”