单词 | Centrechinoida |
释义 | Centrechinoidaplural noun Cen·trech·i·noi·da (ˌ)sen‧ˌtrekə̇ˈnȯidə : a large order of sea urchins having peristomial gills, sphaeridia, and an apically located anus compare cidaroida , exocycloida |
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