| 单词 | synsacrum |
| 释义 | synsacrum —synsacral, adj. /sin sak"reuhm, -say"kreuhm/, n. , pl. synsacra /-sak"reuh, -say"kreuh/. Ornith. a dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae. [1900-05; SYN- + SACRUM] |
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