种子的表面附属结构之一，是种脐到合点之间隆起的脊棱线，内含维管束。并非每种植物的种子都具有，与植物的胚珠类型有关，由倒生胚珠的珠柄发育而来。
与多种脊柱关节病 spondy-loarthropathies
种痘后脑脊髓炎 [内科] post-vaccinal encephalomyelitis
接种后脊髓灰质炎 postinoculation poliomyelitis
一种治疗长脊髓损害 LESCL
你这种强直性脊柱炎 ankylosing sporidylitis
种状态下脊柱功能单元 functional spinal unit ; FSU
和异种的牛脊髓脑匀浆 bovine spinal cord homogenate
接种后脊髓炎 postvaccinal myelitis
基于传输线理论和波导裂缝有源阻抗提取方法，提出了一种脊波导漏壁式滤波器的简化算法。
Based on transmission line theory and extraction method of active impedance of waveguide slot, a simplified computation method for the leaky-wall ridge waveguide filter is presented in this paper.
基因测序现已确定这些病例由一种脊灰病毒引起，该病毒与目前邻国安哥拉流行的病毒密切相关。
Genetic sequencing has determined that the cases are caused by a poliovirus most closely related to that circulating in neighbouring Angola.
我们已经根除了三种野生脊灰病毒菌株之一。
We have already eradicated one of the three strains of wild polio virus.
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