[or.di.nal] n (14c) 1 cap [ME, fr. ML ordinale, fr. LL, neut. of ordinalis]: a book of rites for the ordination of deacons, priests, and bishops
2. [LL ordinalis, fr. ordinalis, adj.]: ordinal number
[2]ordinal adj [LL ordinalis, fr. L ordin-, ordo] (1599) 1: of a specified order or rank in a series
2: of or relating to a taxonomic order