母质

Traditional form:

母質

Pinyin (reading):

mǔzhì

Definitions:

• parent material (e.g. the eroded rock making up sediment)

Characters:

• 母 - mother; female elders; female
• 质 - essence, nature; material, substance

Traditional characters:

• 母 - mother; female elders; female
• 質 - essence, nature; material, substance