internode
/ˈɪntənəʊd/noun
1- a slender part between two nodes or joints, in particular节与节（或关节与关节）间细长的部分, 尤指：
1.1
- Botany a part of a plant stem between two of the nodes from which leaves emerge【植】节间（植物茎部节与节之间长叶子的部分）。
1.2
- Anatomy a stretch of a nerve cell axon sheathed in myelin, between two nodes of Ranvier【剖】结间部; 节间部。
词源
mid 17th cent.: from Latin internodium, from inter- 'between' + nodus 'knot'.