Plutonian in French

(astronomy) Of or relating to the dwarf planet Pluto.

(by extension, geology, historical) Synonym of plutonic (“of, pertaining to, or supporting plutonism, the theory that the rocks of the Earth were formed in fire by volcanic activity, with a continuing gradual process of weathering and erosion, then deposited on the sea bed, re-formed into layers of sedimentary rock by heat and pressure, and raised again”).

(by extension, geology, historical) Synonym of plutonic (“of, pertaining to, or supporting plutonism, the theory that the rocks of the Earth were formed in fire by volcanic activity, with a continuing gradual process of weathering and erosion, then deposited on the sea bed, re-formed into layers of sedimentary rock by heat and pressure, and raised again”).

(geology, historical) A proponent of plutonism; a plutonist.

(chiefly, science fiction) An inhabitant of the dwarf planet Pluto.

(chiefly, science fiction) An inhabitant of the dwarf planet Pluto.