a. (Med.) Of or pertaining to an aneurism; as, an aneurismal tumor; aneurismal diathesis. The more common spelling is aneurysmal. [ 1913 Webster + AS ]
adj. 1. of or pertaining to an aneurysm. Syn. -- aneurismal [ WordNet 1.5 ]
n. 1. a sac-like widening of a blood vessel. [ WordNet 1.5 ]