synsacrum / sɪnˈsæk rəm, -ˈseɪ krəm /

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synsacrum 的定义

n. 名词 noun

plural syn·sac·ra [sin-sak-ruh, -sey-kruh]. /sɪnˈsæk rə, -ˈseɪ krə/. Ornithology.

  1. a dorsal ridge of bone in the pelvic region of birds, formed by the fusion of certain thoracic, lumbar, sacral, and caudal vertebrae.