Sphenophyllales

plural noun

Sphe·​no·​phyl·​la·​les

ˌsfē(ˌ)nōfə̇ˈlā(ˌ)lēz

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

Word History

Etymology

New Latin, from Sphenophyllum + -ales

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