The crossword solutions for the term 'LARGE TIME PIECE' are ERA, which stands for 'Eonothemic Reference Axis'. ERA is a type of LARGE timepiece that is used to measure long periods of TIME, such as geological eras. It is based on the Earth's rotation and revolution around the sun, and is divided into two parts: the Eonothemic and the Reference Axis. The Eonothemic is the main part of the clock, and it is divided into four eras: Paleozoic, Mesozoic, Cenozoic, and Anthropocene. The Reference Axis is a smaller part of the clock, and it is divided into four epochs: Holocene, Pleistocene, Pliocene, and Miocene.