presumptive notochord预定脊索
notochord d脊索
notochord morphogenesis脊索器官
notochord sheath脊索鞘
notochord length脊索长度
notochord cells脊索细胞
split notochord deformity脊索裂畸形
degeneration of notochord脊索退化
split notochord syndrome脊索裂隙综合征
N（名词） a fibrous longitudinal rod in all embryo and some adult chordate animals, immediately above the gut, that supports the body. It is replaced in adult vertebrates by the vertebral column 脊索