\A*ceph"a*li\, n. pl. [LL., pl. of acephalus. See
{Acephal}.]
1. A fabulous people reported by ancient writers to have
   heads.
2. (Eccl. Hist.)
   (a) A Christian sect without a leader.
   (b) Bishops and certain clergymen not under regular
       diocesan control.
3. A class of levelers in the time of K. Henry I.