Definitions

1. noun

a family of extinct or fossilized arthropods, particularly jointed-legged arthropods

“The discovery of the arthrodiae fossils provided a crucial piece of information about ancient arthropod evolution.”

2. plural noun

arthrodiate arthropods, especially those belonging to the extinct subphylum Arthrodousia

“Arthrodiae fossils have been found in sedimentary rocks dating back to the Cambrian period.”