Definition of pinnated in US English:

pinnated

adjective

  • See pinnate

    • ‘There it was, that, year after year, and each successive season, I studied the habits of the Pinnated Grouse.’
    • ‘Pinnated Bittern (Botaurus pinnatus) is a species that is visually similar to the American Bittern (B. lentiginosus) which is more familiar to North American observers.’