Twelver
noun
Twelv·er
| \ -və(r)\
plural -s
Definition of Twelver
: a member of a major Shiʽite sect which acknowledges 12 imams and holds that the 12th will reappear as the Mahdi before the Last Day and of which the tenets and organization have been the state religion of Persia since the 16th century
— called also imami
— compare sevener