Abscisae or Abscissae: How To spell?
The word Abscisae is misspelled against Abscissae, which is plural of "Abscissa"
Abscissae has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings absci & ae which should not be misspelled with single 'S'
Wrong Spelling:  absci-s-ae  Correct Spelling:  absci-ss-ae 
Find more wrongly spelled words of Abscissae to spell it well.