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