Definition of "portass"

an old Priest in that age, which always read in his Portass, Mumpsimus Domine for Sumpsimus; whereof when he was admonished, he said that he now had used Mumpsimus thirty years, and would not leave his old Mumpsimus for their new Sumpsimus.

1605, M. N. [pseudonym; William Camden], Remaines of a Greater Worke, Concerning Britaine, […], London: […] G[eorge] E[ld] for Simon Waterson

Their portases, bedes, temples, aultars.

1545, John Bale, The Image of Both Churches

Boner hath set up again in Paules Salesburi Latin portace.

1553, [unknown translator], Stephen Gardiner, De vera obedientia

Let me see your portous, gentle sir John.

1565, Robert Wever, An Enterlude called lusty Juventus

In his hand his portesse still he bare, That much was worn, but therein little red; For of devotion he had little care.

1590, Edmund Spenser, “(please specify the book)”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie