portass

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

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