encephaloduroarteriosynangiosis

== English == === Etymology === encephalo- +‎ duro- +‎ arteri- +‎ synangiosis === Noun === encephaloduroarteriosynangiosis (usually uncountable, plural encephaloduroarteriosynangioses) A neurosurgical procedure used to improve blood flow to the brain, often performed to treat Moyamoya disease.