• (a.) Having the tongue finely notched along the sides, so as to have a featherlike appearance, as the toucans.
Pter`o·glos'sal adjective [ Greek ... a feather + ... tongue.] (Zoology) Having the tongue finely notched along the sides, so as to have a featherlike appearance, as the toucans. 
pteroglossal Having the tongue finely notched along the sides, so as to have a featherlike appearance, as the toucans (fruit-eating birds of tropical America).