Aneurysm (noun)

1. A localized, blood-filled dilatation of a blood vessel caused by a weakening of the vessel wall, usually aortic or cerebral.
2. A pathological dilatation of a blood vessel caused by disease or weakness in the wall of the vessel.

Origin:

From the greek ἀνεύρυσμα, aneurusma, meaning "dilation" or "rupture".

Examples:

1. The patient was diagnosed with an aneurysm in the aorta and had to undergo surgery.
2. Aneurysms can be caused by a number of factors, including high blood pressure and smoking.
3. The doctor was able to detect the aneurysm on the patient's brain by using a CT scan.
4. The patient's family was informed that an aneurysm could be life-threatening if left untreated.
5. The patient was discharged from the hospital after the aneurysm was successfully treated.