Fibrilary or Fibrillary: How To spell?
The word Fibrilary is misspelled against Fibrillary, an adjective meaning "pertaining to fibrils."
Fibrillary has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings fibri & ary which should not be misspelled with single 'L'
Wrong Spelling:  fibri-l-ary  Correct Spelling:  fibri-ll-ary 
Find more wrongly spelled words of Fibrillary to spell it well.