interlining

inter- +‎ lining

interlining (plural interlinings)

1. A cloth lining between the outer and inner layers of a garment.
2. Correction or alteration by writing between the lines; interlineation.
   • 1724, [Gilbert] Burnet, edited by [Gilbert Burnet Jr.], Bishop Burnet’s History of His Own Time. […], volumes (please specify |volume=I or II), London: […] Thomas Ward […], →OCLC:

     And the interlinings seemed to be writ in a hand different from that in which the papers were writ

3. The scheduling of vehicles to operate more than one route, or the selling of tickets for a trip across multiple carriers

• interfacing

(cloth lining):

• interliner

interlining

1. present participle and gerund of interline