The operculum of a periwinkle. Obsolete. rare.
| 单词 | θ33010 | 
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > 			[noun]		 > superorder Branchifera > order Prosobranchiata > section Holostomata > family Littorinidae > operculum of periwinkle (1)		 patch1835 The operculum of a periwinkle. Obsolete. rare.  | 
	
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