Crisum or Crissum: How To spell?

The word Crisum is misspelled against Crissum, a noun meaning "That part of a bird, or the feathers, surrounding the cloacal opening; the under tail coverts."

Crissum has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings cri & um which should not be misspelled with single 'S'
Wrong Spelling: cri-s-um
Correct Spelling: cri-ss-um
Check more misspelled words of Crissum to spell it correct.