velamen中文什么意思

n.
(pl. -lamina )
1.【解剖学】帆，膜，被膜。
2.【植物；植物学】根被。

• velamen vuluae:    外阴唇展长,阴门帘
• velamen vulvae:    外阴唇展长, 阴门帘

例句与用法

1. The roots of many orchids and other epiphytes developed a sheath of dead cells , the velamen , which helps to absorb water from the atmosphere
   许多兰科植物的根和一些附生植物的死细胞鞘以及根被都可以帮助植物从空气中吸收水分。
2. Root of backbone nerve around is in backbone ganglion is far side assemble , scabbard of stiff backbone film also closes subsequently for one scabbard , become backbone nerval velamen , namely the film outside nerve , because backbone ganglion is located in between vertebra kong shuiping , the length of backbone nerve root has variation consequently
   脊神经前后根在脊神经节远侧会合，硬脊膜鞘也随之合为一鞘，成为脊神经的被膜，即神经外膜，由于脊神经节位于椎间孔水平，脊神经根的长度因而有变异。

百科释义

Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants, such as orchid and Clivia species.