amphidromical

Adjective

 * 1) Pertaining to the Amphidromia.
 * 2) * 1658: If any shall doubt why at the Amphidromicall Feasts, on the fifth day after the Childe was born presents were sent from friends, of Polipusses, and Cuttle-fishes? — Sir Thomas Browne, The Garden of Cyrus (Folio Society 2007, p. 213)