| 单词 | trochal apparatus | 
| 释义 | > as lemmastrochal apparatus  a.  Zoology. Resembling a wheel; rotiform: as the  trochal apparatus,  trochal disc, or  trochal organ of the Rotifera, an organ of locomotion consisting of two rings of cilia surrounding the mouth. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Rotifera > 			[adjective]		 > resembling a wheel trochal1855 1855    T. R. Jones Gen. Outl. Animal Kingdom 		(ed. 2)	 ix. 191  				The space between the two layers of the trochal disc. 1888    G. Rolleston  & W. H. Jackson Forms Animal Life 		(ed. 2)	 632  				Class Rotifera. Unisegmental Vermes with a retractile trochal apparatus at the anterior end of the body. 1899    New Sydenham Soc. Lexicon  				Trochal organ, the characteristic oral organ of the Rotifera. < as lemmas | 
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