Costelate or Costellate: How To spell?

The word Costelate is misspelled against Costellate, an adjective meaning "Finely ribbed or costated."

Costellate has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings coste & ate which should not be misspelled with single 'L'
Wrong Spelling:  coste-l-ate 
Correct Spelling:  coste-ll-ate 
Find more incorrect spellings of Costellate to spell right way.