The Collaborative International Dictionary
Self-conjugate
Self-conjugate \Self`-con"ju*gate\, a. (Geom.) Having the two things that are conjugate parts of the same figure; as, self-conjugate triangles.
Wiktionary
self-conjugate
a. (context physics English) Of an subatomic particle that is identical to its antiparticle; includes all gauge bosons except the charged W-boson and quarks.