外壳

Traditional form:

外殼

Pinyin (reading):

wàiké

Definitions:

• envelope
• outer shell
• hull
• cover
• case

Characters:

• 外 - out, outside, external; foreign; in addition
• 壳 - casing, husk, shell

Traditional characters:

• 外 - out, outside, external; foreign; in addition
• 殼 - casing, husk, shell