“Metaphysics” shouldn’t really be thought of as a description of the discipline the way, say, metamathematics is a description of a discipline. The name “metaphysics” is basically a historical accident. Aristotle’s Metaphysics was called that because it was published after his Physics, not because of any relationship between the content of physics and metaphysics. So while it’s true they’re not practicing meta-medicine, they’re not practicing meta-physics either.
Anyway, according to Wikipedia, both “metaphysicist” and “metaphysician” are correct.
It should be metaphysicist. They don’t practice metamedicine.
“Metaphysics” shouldn’t really be thought of as a description of the discipline the way, say, metamathematics is a description of a discipline. The name “metaphysics” is basically a historical accident. Aristotle’s Metaphysics was called that because it was published after his Physics, not because of any relationship between the content of physics and metaphysics. So while it’s true they’re not practicing meta-medicine, they’re not practicing meta-physics either.
Anyway, according to Wikipedia, both “metaphysicist” and “metaphysician” are correct.
“Metaphysician” is in Merria-m-Websete, “Metaphysicist” is not.