The technical term for anyone who studies the fossils of prehistoric creatures other than humans (including dinosaurs) is "paleontologist."
A person that studies or researches dinosaur are called Paleontologists.
What is the name of a person that studies organisms
Paleontogist studies extinct animals including Dinosaurs.
A person who studies sound is called an acoustician.
A person who studies sand is known as a psammologist.
An entomologist is a person who studies insects.
A person who studies audiology would be called an audiologist.
What is the name of a person that studies derivation of
A horologist studies time.
A dietician.
Etymologist