mitrate,a.Bot. and Zool.|ˈmaɪtreɪt| [ad. L. mitrāt-us wearing a turban, f.mitra: see mitre n. and -ate.] Having the shape of a mitre or bonnet. 1848E. Forbes Naked-eyed Medusæ 22 The umbrella is sub-cylindrical and mitrate.1887W. Phillips Brit. Discomycetes 1 Receptacle..mitrate.