Pronunciation: (in-op'ur-u-bul, -op'ru-bul), [key]
1. not operable or practicable.
2. Med.not admitting of a surgical operation because the pathological condition is not amenable to cure by surgery or because of undue risk. Cf. operable (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.