noun
anatomist
A specialist in anatomy, typically a scientist or medical professional who studies the structure of living organisms.
彼は有名な解剖学者です。
He is a famous anatomist.
解剖学 is the field of anatomy, while 解剖学者 refers to a person who practices or studies it.
Compound of 解剖 (dissection, anatomy) + 学 (study, -ology) + 者 (person, -ist).