liripipe
/ˈlɪrɪpʌɪp
/noun
A long tail hanging from the back of a hood, especially in medieval or academic dress.People sported embroidered and vividly coloured wool and linen garments, high fashion tunics, breeches, a liripipe (a hood with a tail) and a variety of shoes that were everyday or best dress, rather than made for the grave.
Origin
Early 17th century: from medieval Latin liripipium 'tippet of a hood, cord', of unknown origin.