noun
: surgery involving a risk to the life of the patient ; specifically : an operation upon an organ within the cranium, chest, abdomen, or pelvic cavity — compare minor surgery
noun
: surgery involving a risk to the life of the patient ; specifically : an operation upon an organ within the cranium, chest, abdomen, or pelvic cavity — compare minor surgery
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012