An Excessive Enlargement of an Artery
Puzzle 19 of Patterns in Nature Pack
Question is: An Excessive Enlargement of an Artery
and the answer is: ANEURYSM
Word Meaning:
ANEURYSM — (pathology) An abnormal blood-filled swelling of an artery or vein, resulting from a localized weakness in the wall of the vessel.
Definitions from Wiktionary.