adjective Etymology: International Scientific Vocabulary Date: circa 1859 of, relating to, or being an epoch of the Tertiary between the Eocene and Miocene or the corresponding series of rocks, ~ noun
OLIGOCENE
Meaning of OLIGOCENE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012