Bipinated or Bipinnated: How To spell?
The word Bipinated is misspelled against Bipinnated, an adjective meaning "Twice pinnate."
Bipinnated has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings bipi & ated which should not be misspelled with single 'N'
Wrong Spelling:  bipi-n-ated  Correct Spelling:  bipi-nn-ated 
Find more wrongly spelled words of Bipinnated to spell it well.