Portass \Por"tass\, n. [OF. porte-hors a kind of prayer book, so called from being portable; cf. LL. portiforium.] A breviary; a prayer book. [Written variously {portace}, {portasse}, {portesse}, {portise}, {porthose}, {portos}, {portus}, {portuse}, etc.] [Obs.] --Spenser. Camden. [1913 Webster] By God and by this porthors I you swear. --Chaucer. [1913 Webster]
Portos \Por"tos\, n. See {Portass}. [Obs.] [1913 Webster]