Definitions

1. noun

A geologist or scientist who believes that the Earth’s features, such as mountains, are formed by the movement of molten material beneath the surface, rather than by erosion or other processes.

“Some scientists are plutonists, believing that the Earth’s mountain ranges were formed through plutonic activity.”

2. noun

A person who advocates for or supports plutonian theories about the Earth or other celestial bodies.

“The geologist was a known plutonist, and her theories were widely debated among the scientific community.”