Velum or Vellum: How To spell?
The word Velum is misspelled against Vellum, a noun meaning "A fine kind of parchment, usually made from calfskin, and rendered clear and white, -- used as for writing upon, and for binding books."
Vellum has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings ve & um which should not be misspelled with single 'L'
Wrong Spelling:  ve-l-um  Correct Spelling:  ve-ll-um 
Check more misspelled words of Vellum to spell it correct.