始新世 Traditional form: 始新世 Pinyin (reading): Shǐxīnshì Definitions: Eocene (geological epoch from 55m-34m years ago) Characters: 始 - to begin, to start; beginning 新 - new, recent, fresh, modern 世 - generation, era, age; world Traditional characters: 始 - to begin, to start; beginning 新 - new, recent, fresh, modern 世 - generation, era, age; world