Ordovician Period | ยุคออร์โดวิเชียน [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
ordovician | (n) from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds, Syn. Ordovician period |
オルドビス紀 | [オルドビスき, orudobisu ki] (n) Ordovician period [Add to Longdo] |
奥陶紀 | [おうとうき, outouki] (n) (obsc) (See オルドビス紀) Ordovician period [Add to Longdo] |