[reg.o.lith] n [Gk rhegos blanket + E -lith; akin to Gk rhezein to dye--more at raga] (1897): unconsolidated residual or transported material that overlies the solid rock on the earth, moon, or a planet
REGOLITH
Meaning of REGOLITH in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012