interposer

noun

1. One who interposes.

   “Since I have your good leave to go away, I will make haste: but, till I come again, No bed shall e'er be guilty of my stay, No rest be interposer 'twixt us twain.”

   “But if now / You ſhould (as cruell fathers do) proclame / Your right, and Tyrant like uſurp the glory / Of my peculiar honours, not deriv'd / From ſucceſſary, but purchas'd with my bloud, / Then I muſt ſtand firſt Champion for my ſelfe, / Againſt all interpoſers.”

2. An electrical interface between one connection or socket and another, used to spread a connection to a wider pitch or to reroute it.

   “The drillable centre-line determining device disclosed in this patent takes the form of an interposer which has on its underside a projecting location pin perpendicular to its upper surface which acts as a planarisation platform.”

   “As the name suggests, an interposer is placed in between the packaging substrate and dies to provide electrical interface routing. The objective of an interposer is to electrically reroute a terminal to different dies or to extend a connection to broader areas via wider pitch.”