Bipectinate A structure or an organ shaped like a comb, with hair-like or feather-like extensions on both sides. Website https://www.google.co.il/search?q=bipectinate&biw=1280&bih=687&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwj_ppjYzaHMAhUKORoKHV_NCrEQsAQIJA&dpr=1.5