Sededema
| Sededema Седедема / Сэдэдэмэ | |
|---|---|
| Mouth location in Yakutia, Russia | |
| Location | |
| Country | Russia | 
| Physical characteristics | |
| Source | |
| • location | Alazeya Plateau | 
| Mouth | Kolyma | 
|  • coordinates | 67°05′38″N 153°01′40″E / 67.0938°N 153.0278°E | 
| Length | 567 km (352 mi) | 
| Basin size | 18,500 km2 (7,100 sq mi) | 
| Basin features | |
| Progression | Kolyma→ East Siberian Sea | 
The Sededema (Russian: Седедема; Yakut: Сэдэдэмэ, Sededeme) is a river in Sakha Republic, Russia. It is a left tributary of the Kolyma. It is 567 kilometres (352 mi) long, and has a drainage basin of 18,500 square kilometres (7,100 sq mi).