The term 'Pacific Rings' is a reference to the Pacific Ring of Fire, a region of intense seismic and volcanic activity that encircles the Pacific Ocean. The term is derived from the fact that the area is home to 452 volcanoes, many of which are still active. The crossword solution for this term is LEIS, which is a Hawaiian word meaning 'GARLAND' or 'WREATH'. It is often used to refer to the traditional Hawaiian garlands made of flowers, leaves, and shells that are worn around the neck.