The word Pinae is misspelled against Pinnae, which is plural of "Pinna"
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Pinnae has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings pi & ae which should not be misspelled with single 'N'
Wrong Spelling:  pi-n-ae 
Correct Spelling:  pi-nn-ae 
Find more wrongly spelled words of Pinnae to spell it well.