Question Chemical diagrams

[agentgonzo]

What does the wiggly line in the diagram Of an amphetamine molecule mean?

http://upload.wikimedia.org/wikipedia/commons/2/28/Amphetamine-2D-skeletal.svg

 

[tl8]

http://en.wikipedia.org/wiki/Skeletal_formula#Stereochemistry

wavy lines represent either unknown stereochemistry or a mixture of the two possible stereoisomers at that point