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单词 siphonostele
释义
si·phon·o·stele (sī-fŏnə-stēl, sīfə-nə-stēlē)
n.
A stele in which the vascular tissue is in the form of a cylinder surrounding the pith, as in the stems of most ferns and other seedless vascular plants.

[SIPHON + STELE.]

si·phono·stelic (-stēlĭk) adj.
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