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Sphenophyllales

plural noun
Sphe·​no·​phyl·​la·​les | \ ˌsfē(ˌ)nōfə̇ˈlā(ˌ)lēz\

Definition of Sphenophyllales

: an order of fossil plants (subdivision Sphenopsida) coextensive with the genus Sphenophyllum

History and Etymology for Sphenophyllales

New Latin, from Sphenophyllum + -ales

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