Irotational or Irrotational: How To spell?
The word Irotational is misspelled against Irrotational, an adjective meaning "Not rotatory; passing from one point to another by a movement other than rotation; -- said of the movement of parts of a liquid or yielding mass."
Irrotational has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings i & otational which should not be misspelled with single 'R'
Wrong Spelling:  i-r-otational  Correct Spelling:  i-rr-otational 
Find more incorrect spellings of Irrotational to spell right way.