Anatomy and Zoology. The ventral nerve cord of certain leeches. Now rare. Perhaps Obsolete.
| 单词 | θ32349 | 
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > division Vermes > 			[noun]		 > member of (worm) > nerve cord (1)		 medulla1878 Anatomy and Zoology. The ventral nerve cord of certain leeches. Now rare. Perhaps Obsolete. | 
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