Seeing as how a dentist practices dentistry, I believe the answer would be a dentist. Hope this helps!
Answer: 364 licks
Explanation:
A group of engineering students from Purdue University reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a Tootsie Pop.
C. The word originated from greek philosophers during the study of 1667