| 单词 | periblem | 
| 释义 | Word Frequency periblem(ˈpɛrɪˌblɛm) noun  botany a layer of meristematic tissue in stems and roots that gives rise to the cortex  Word origin C19: via German from Greek periblēma protection, from periballein to throw around, from peri- + ballein to throw | 
	
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