An Etymological Dictionary of Astronomy and Astrophysics

1. Molten → rock material that occurs below Earth’s surface.
   

2. Molten material both below and on top of the surface of a → planet.

Etymology (EN): From L. magma “dregs of an ointment,” from Gk. magma “an ointment,” from root of massein “to knead, mold.”

Etymology (PE): Mâgma, loanword from Fr.