Reflex opposition to change.
Hiccuping is an example of something that would be described as a reflex action.
When something is flying at your head and you instinctively close your eyes without thinking about it, this is an example of a reflex.
His quick reflexes make him a good taxi driver.
A boxer with good reflexes.
A reflex effect.
Quick reflexes make for a good taxi driver.
On the depths of death there swims / The reflex of a human face.