| 单词 | nucleobranch | 
| 释义 | † nucleobranchn.adj. Zoology. Obsolete. rare.  A. n.   A gastropod mollusc of the former order  Nucleobranchiata, which chiefly comprised the heteropods.De Blainville also included the cephalopod genus  Argonauta in his order. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > 			[noun]		 > superorder Branchifera > order Nucleobranchiata > member of nucleobranch1851 1851    S. P. Woodward Man. Mollusca  i. 11  				The nucleobranches and pteropods swim in the open sea. 1861    Rep. Smithsonian Instit. 172  				The Nucleobranchs have the gills in a tuft at the lower part of the back, sometimes protected by a shell.  B. adj.   Of, relating to, or characteristic of the former order  Nucleobranchiata. ΚΠ 1890    Cent. Dict.  				Nucleobranch, pertaining to the Nucleobranchiata, or having their characters; heteropodous. Derivatives  nucleobranchiate adj. rare ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > 			[adjective]		 > of superorder Branchifera > of the nature of a heteropod nucleobranchiate1854 1854    S. P. Woodward Man. Mollusca  ii. 198  				There are two families of nucleobranchiate mollusks. This entry has been updated (OED Third Edition, December 2003; most recently modified version published online December 2020). <  | 
	
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