外源

Traditional form:

外源

Pinyin (reading):

wàiyuán

Definitions:

• exogenous

Characters:

• 外 - out, outside, external; foreign; in addition
• 源 - spring; source, root, head; surname

Traditional characters:

• 外 - out, outside, external; foreign; in addition
• 源 - spring; source, root, head; surname