plural noun
Cla·​dox·​y·​la·​ce·​ae | \kləˌdäksəˈlāsēˌē\

Definition of Cladoxylaceae 

: a family of fossil plants that is coextensive with the genus Cladoxylon and is placed in the order Psilophytales or Cladoxylales

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History and Etymology for Cladoxylaceae

New Latin, from Cladoxylon, type genus + -aceae

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to express warning or disapproval

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