paleocene epoch Paleocene • paleocerebellum · · · Info · Definitions · Characters · · paleocene epoch · · Text Common · · Latin · · Scripts 15 · · Length 6 · · Syllables Definitions · · · (noun) from 63 million to 58 million years ago; appearance of birds and earliest mammals. Synonyms: Paleocene, Paleocene epoch. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070