Lacking a head or a clearly defined head.

Roget 59: disorderly, orderless; out of order, out of place, out of gear; irregular, desultory; anomalous etc. (unconformable) 83; acephalous^†, deranged; aimless; disorganized; straggling; unmethodical, immethodical^†; unsymmetric^†, unsystematic; untidy, slovenly; dislocated; out of sorts; promiscuous, indiscriminate; chaotic, anarchical; unarranged etc. (arrange) etc. 60; confused; deranged etc. 61; topsy-turvy etc. (inverted) 218; shapeless etc. 241; disjointed, out of joint.    troublous^†; riotous etc. (violent) 173.    complex etc. 59.1. ... show more