Muka, n. 1. Prepared fibre of flax. Ko te rama he mea miro ki te muka (T. 195).
2. Unexpanded shoot of nikau (Rhopalostylis sapida).
3. Used also of the ara, or way, by which an atua communicates with the medium. Ka kiia iho e Te Rehu o Tainui kia uhia, kia kimihia te muka.
Williams Dictionary