pseudocardinal

noun2

1. •
   (historical) A cardinal appointed by an antipope and consequently seen as illegitimate by the pope and those who recognize him.

   • It owes its origin to the schism which Alexander V. attempted to heal in 1409 by forming one body of his own (the legitimate) and of the pseudocardinals of the anti-pope Benedict XIII. — 1875
2. •
   A type of tooth found on the shells of some bivalve molluscs.

   • Right valve with three pseudocardinal teeth, the front one being strongest, high and triangular, the second low and longer, the posterior one indistinctly differentiated from the hinge plate. — 1922