Shi·ite also Shi·'ite 
(shēīt′)
(shēīt′)n.
A member of the branch of Islam that regards Ali and his descendants as the legitimate successors to Muhammad and rejects the first three caliphs.
adj.
Of or relating to the Shiites or their branch of Islam.
[Arabic šī'a, partisans; see SHIA.]
Shi·itic (-ĭtĭk) adj.