A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
肋骨，叶脉：肋骨或肋骨状部分，例如叶子的中脉或昆虫翼的较厚的前部线或边。
2
The results are as follow: 1. In the unilateral complete cleft lip, superior labial artery runs along the labial margin and cleft edge, ending in base of nasal wing on the lateral side.