magma
noun /ˈmæɡmə/
/ˈmæɡmə/
[uncountable] (specialist)- enlarge imagevery hot liquid rock found below the earth’s surfaceWord Originlate Middle English (in the sense ‘residue of dregs after evaporation ’or‘ pressing of a semi-liquid substance’): via Latin from Greek magma (from massein ‘knead’).