antiport

From anti- +‎ port.

antiport (plural antiports)

1. (cytology) A structure in a cell membrane that simultaneously transports different molecules or ions through the membrane in opposite directions.

• antiporter

antiport (third-person singular simple present antiports, present participle antiporting, simple past and past participle antiported)

1. To simultaneously transport different molecules or ions through a cell membrane in opposite directions.

antiport (plural antiports)

1. Obsolete form of anteport.
   • 1668, Paul Rycaut, “A True Relation of the Designs Managed by the Old Queen, Wife of Sultan Ahmet, […]”, in The Present State of the Ottoman Empire. Containing the Maxims of the Turkish Politie, […], London: […] John Starkey and Henry Brome, […], →OCLC, page 15:

     [T]he Viſier and Solyman Aga went to the Chamber where the King ſlept, and lifting up the Antiport, made a ſign of ſilence to the Ladies of the Guard , commanding by dumb motions that the Young Queen ſhould be awakened […]

   • 1678, Tho[mas] Smith, Remarks upon the Manners, Religion and Government of the Turks. […], London: […] Moses Pitt, […], →OCLC, pages 74–75:

     This like the Chappel at Mecca, they eſteem ſo holy, that it is only lawful for a Muſulman to enter into it. If a Chriſtian or Jew ſhould but lift up the Anti[-]port, and ſet one ſtep into it, he profaned it, […]

   • 1735 August 13 (Gregorian calendar), “Letter II, and Last. From a Gentleman in Constantinople, to His Friend in London.”, in The Weekly Amusement: or, The Universal Magazine. […], volume III, London: […] J. and T. Dormer […], →OCLC, page 1000, column 2:

     Lifting up the antiport, and advancing a little forward, I could not perceive the leaſt noiſe; […]

   • 1794, Pat[rick] Russell, “Of the Inhabitants in General”, in Alex[ander] Russell, Pat. Russell, The Natural History of Aleppo. […], 2nd edition, volume I, London: […] G[eorge,] G[eorge] and J[ohn] Robinson, […], →OCLC, page 146:

     [I]n bed chambers, and other ſmall rooms, where the air is excluded by window curtains, cloſe doors, and antiports, it [charcoal] is then moſt dangerous when the greateſt pains have been taken to burn it clear; […]