i would guess it means to swap the wires over, so if you had two 20 pin connectors: 1 - 20 2 - 18 3 - 17 etc
=> this is parallel => => this is antiparallel <= sorry, couldn't put it into words. Hope you understand
If two components are specified to be wired in inverse parallel, they'd be connected in parallel, inversely i.e. one component is one way round, the other component is the other way round.
It's normally referring to "directional" components like Light-Emitting Diodes (LEDs), so connecting in inverse parallel means on an AC signal one diode conducts when current is flowing in one direction, t'other conducts when the current flow reverses. An LED can be paired with an ordinary diode in inverse-parallel so the LED isn't damaged by a high reverse voltage - the reverse pressure just goes easily through the diode. Example here.
Paralleled but with the polarity reversed. I've seen this term applied to bicolor 2-terminal led's. But the first thought when I hear that term is:
Thanks for the replys... Thanks for the help still getting wraped around AC.... Escher! Awesome Thanks for the linkage and inverse enlightment