N a mollusc of the suborder Tectibranchia (or Tectibranchiata) (order: Opisthobranchia) which includes the sea slugs and sea hares 被鳃类
N（名词） a mollusc of the suborder Tectibranchia (or Tectibranchiata) (order: Opisthobranchia) which includes the sea slugs and sea hares 被鳃类