词根词缀：-cene

【来源及含义】Greek: a suffix; new, denotes certain "recent" eons when naming geological periods

【同源单词】Eocene, Oligocene, Paleocene, Pleistocene, Pliocene

词根词缀：palaeo-, palae-, paleo-, pale-

【来源及含义】Greek: original, ancient, primitive, old

【同源单词】ichthyopaleontology, palaeacanthocephala, palae-ethnology, palaeoclimatology, palaeoichnology, palaeontology