| 单词 | Diceras | 
| 释义 | Dicerasnoun  Dic·er·as    ˈdīsərəs,  dīˈserəs     : a genus (the type of the family Diceratidae) of Jurassic lamellibranchs with the umbones of both valves produced and spirally curved and the hinges thick and bearing prominent teeth    | 
	
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