Botany. thickening layer, thickening mass, thickening ring (German verdickungsring): see quots.
| 单词 | θ22268 | 
| 释义 | the world > plants > part of plant > cell or aggregate tissue > 			[noun]		 > tissue > meristem > ring or layer of (2)		 thickening ring1875 Botany. thickening layer, thickening mass, thickening ring (German verdickungsring): see quots. thickening layer1900 Botany. thickening layer, thickening mass, thickening ring (German verdickungsring): see quots. | 
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