vel·lum
noun/ˈveləm/
/ˈveləm/
[uncountable]- material made from the skin of a sheep, goat or calf, used for making book covers and, in the past, for writing on
（书封或旧时书写用的）羊皮纸，犊皮纸 - smooth cream-coloured paper used for writing on
仿羊皮纸；仿犊皮纸
Word Originlate Middle English: from Old French velin, from veel , from Latin vitellus, diminutive of vitulus ‘calf’.