synsacrum

/sin-sak-ruhm, -sey-kruhm/US // sɪnˈsæk rəm, -ˈseɪ krəm //

阴阳师,阴谋论,阴阳镜,阴阳合同

Definitions

n.名词 noun

1
plural syn·sac·ra [sin-sak-ruh, -sey-kruh]. /sɪnˈsæk rə, -ˈseɪ krə/. Ornithology.
- : a dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae.