plural noun Pro·ar·thri \prōˈärˌthrī\

Definition of Proarthri

in some classifications

  1. :  a suborder of Cestraciontes that includes the Heterodontidae and related forms having the palatoquadrate apparatus articulated with the preorbital part of the skull

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Origin and Etymology of proarthri

New Latin, from 1pro- + -arthri (from Greek arthron joint) — more at arthr-

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