| oligochete | a. (Zool.) Of or pertaining to the |
| Oligocene | a. [ Oligo- + Gr. &unr_; new, recent. ] (Geol.) Of, pertaining to, or designating, certain strata which occupy an intermediate position between the Eocene and Miocene periods. -- |
| Oligocene Epoch | สมัยโอลิโกซีน [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
| oligocene |
| oligocene | (n) from 40 million to 25 million years ago; appearance of sabertoothed cats, Syn. Oligocene epoch |