What is "kalashtar"

The kalashtar are a race of psionic people in the Eberron campaign setting of the Dungeons & Dragons fantasy role-playing game. They are descendants of a group of human monks from Adar who allowed themselves to be possessed by good-aligned Quori fleeing Dal Quor. Over time, the connection between the two has become inseparable. As the kalashtar greatly outnumber the good-aligned Quori, the spiritual essence of each Quori is divided out amongst many Kalashtar, known collectively as a lineage. Thus, the only way to completely destroy one of the good-aligned Quori is to exterminate its entire lineage. Many kalashtar follow the Path of Light.