[ad. med.L. honorificabilitudinitas (Mussatus c1300 in Du Cange), a grandiose extension of honorificabilitudo honourableness (in a charter of 1187, Du Cange), f. honorificabilis honourable. Cf. Complaynt of Scotland (1548-9), Prolog. lf. 14b, Shakes. L.L.L. v. i. 44, and Marston Dutch Courtezan v. (1605) H, where the L. abl. pl. honorificabilitudinitatibus is cited as a typical long word, as honorificabilitudinitate had been previously by Dante De Vulg. Eloq. II. vii.] OED