plural noun
Coe·​nop·​ter·​i·​da·​les | \ ˌsē(ˌ)näpˌterəˈdā(ˌ)lēz, ˌse- \

Definition of Coenopteridales

: an order of extinct Devonian and Carboniferous ferns that is usually considered as part of or coextensive with the subclass Primofilices and that has both simple and pinnate leaves with the latter having pinnae at an angle to the plane of the leaf blade

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History and Etymology for Coenopteridales

New Latin, from coen- + Greek pterid-, pteris fern + New Latin -ales

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Cite this Entry

“Coenopteridales.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2020.

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