Ilustratory or Illustratory: How To spell?
The word Ilustratory is misspelled against Illustratory, an adjective meaning "Serving to illustrate."
Illustratory has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings i & ustratory which should not be misspelled with single 'L'
Wrong Spelling:  i-l-ustratory  Correct Spelling:  i-ll-ustratory 
Check more misspelled words of Illustratory to spell it correct.