Shi·a or Shi·ah also Shi·'a 
(shēə) Islam
(shēə) Islam n.
1. (Used with a pl. verb) The Shiites.
2. (used with a sing. verb) A Shiite.
adj.
Shiite.
[Arabic šī'a, following, sect, from šā'a, to spread, become known; see śyʿ in the Appendix of Semitic roots.]