外层

Traditional form:

外層

Pinyin (reading):

wàicéng

Definitions:

• outer layer
• outer shell

Characters:

• 外 - out, outside, external; foreign; in addition
• 层 - layer, floor, story, stratum

Traditional characters:

• 外 - out, outside, external; foreign; in addition
• 層 - layer, floor, story, stratum