Understand 'perspiration' signifies a bodily function, but isn't used for all kinds of excretion. After running, her shirt was soaked with perspiration.
Pro Tip 2/3
Emotional Response
'Perspiration' can indicate stress or anxiety; it's not just from heat or illness. Before the speech, he felt nervous and perspiration appeared on his palms.
Pro Tip 3/3
Non-Literal Use
Sometimes used to describe any type of moisture, like condensation on a glass. There was a ring of perspiration around the cold soda bottle.