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How well do the professionals at Seattle Grace know their doctor lingo? Pretty well, as it turns out!

Related: Eric Dane Announces Exit From 'Grey's Anatomy'

Granted they only play doctors on TV, the stars of Grey's Anatomy displayed an admirable grasp on medical terminology as ET stopped by the set with Dr. Sonu Ahluwalia (an orthopedic surgeon often deemed the "Dr. Oz of India"), who put the cast to the test.

Just who fared best between Ellen Pompeo, Chandra Wilson, James Pickens, Jr. and Kevin McKidd? Watch the video to find out!

Related: 'Grey's Anatomy' Star Sara Ramirez Gets Married

Grey's Anatomy returns for its season nine premiere September 27 on ABC.