| sinor |
| sinornis | (n) sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds |
| 驢馬の橋;ロバの橋 | [ろばのはし(驢馬の橋);ロバのはし(ロバの橋), robanohashi ( roba no hashi ); roba nohashi ( roba no hashi )] (n) pons asinorum (hurdle to learning) [Add to Longdo] |
