puka

noun3

1. •
   A small, usually perforated, wave- and beach-polished shell fragment formed from the spire of a cone, found along beaches of Pacific islands, and used especially to make necklaces.
2. •
   The evergreen tree Meryta sinclairii, endemic to New Zealand.
3. •
   The epiphytic plant Griselinia lucida, native to New Zealand.