rictal,a.Ornith.|ˈrɪktəl| [f. L. rict-us rictus + -al1.] Of or pertaining to the rictus. 1825Trans. Linnean Soc. XV. 255 The strength of the rictal bristles.1884Coues Birds N.W. (ed. 2) 289 A few rictal bristles..reaching little..beyond the nostrils.