The term 'YELLOW STONE' is a combination of two words: 'YELLOW' and 'STONE'. The first word, 'YELLOW', is a color that is often associated with sunshine, happiness, and optimism. The second word, 'STONE', is a hard material that is often used in construction and landscaping. Together, the two words form the name of a national park in the United States, Yellowstone National Park. It is located primarily in Wyoming, but also extends into Montana and Idaho. It is known for its geothermal features, such as hot springs and geysers, and its wildlife, including grizzly bears, wolves, and bison. The crossword solution for this term is 'YELLOW'>TOPAZ', which is a YELLOW-colored gemstone.