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.

By God and by this porthors I you swear. Chaucer.


© Webster 1913.

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