Zaidiyya, Zaidism or Zaydism (Arabic: الزيدية
az-zaydiyya, adjective form Zaidi or Zaydi) is a Shī'a maðhab
(sect, school) named after the Imām Zayd ibn ˤAlī. Followers of
the Zaidi fiqh are called Zaidis (or are occasionally called
Fivers in the West). However, there is also a group called the
Zaidi Wasītīs who are Twelvers (see below).