adjective Date: 1831 of, relating to, or being an epoch of the Tertiary between the Paleocene and the Oligocene or the corresponding series of rocks, ~ noun
EOCENE
Meaning of EOCENE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012