Cosical or Cossical: How To spell?
The word Cosical is misspelled against Cossical, an adjective meaning "relating to algebra; as, cossic numbers, the cossic art."
Cossical has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings co & ical which should not be misspelled with single 'S'
Wrong Spelling:  co-s-ical  Correct Spelling:  co-ss-ical 
Find more incorrect spellings of Cossical to spell right way.