Sigilum or Sigillum: How To spell?
The word Sigilum is misspelled against Sigillum, a noun meaning "A seal."
Sigillum has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings sigi & um which should not be misspelled with single 'L'
Wrong Spelling:  sigi-l-um  Correct Spelling:  sigi-ll-um 
Check more misspelled words of Sigillum to spell it correct.