noun, noun which may take the genitive case particle 'no'
Phanerozoic
Geological term for the current eon, spanning from about 541 million years ago to the present. Used in scientific contexts.
顕生代は、古生代、中生代、新生代に分けられる。
The Phanerozoic is divided into the Paleozoic, Mesozoic, and Cenozoic eras.