Still... I can do the dictionary reference too!
ellipsis
/ɪˈlɪpsɪs/
noun (pl) -ses (-siːz)
1. Also called eclipsis. omission of parts of a word or sentence
2. (printing) a sequence of three dots (…) indicating an omission in text
Word Origin
C16: from Latin, from Greek elleipsis omission, from elleipein to leave out, from leipein to leave
Now, if you check the above refrenced "eclipsis", a similarly correct spelling of the plural is eclipsises. You see, it depends where you go... my way causes no confusion. :)
Other than pronunciation, there is no way to tell if "ellipses" is this:
OR...
... . . . …