fraterculine adjective1 •(rare) Belonging to or characteristic of the genus Fratercula; pertaining to puffins.Lastly, in 1896, Kellogg described two new species, viz. D. calwu from a variety of the Common Guillemot, and D. acutipedus from a Fraterculine host. — 1912 formsmore fraterculine · most fraterculine