The Collaborative International Dictionary of English v.0.48:

Amphidromical \Am`phi*drom"ic*al\, a. [Gr. 'amfi`dromos running
   about or around.]
   Pertaining to an Attic festival at the naming of a child; --
   so called because the friends of the parents carried the
   child around the hearth and then named it.
   [1913 Webster]