Di·a·try·ma | \ ˌdīə‧ˈtrīmə \
Definition of Diatryma
: a genus of large flightless Eocene birds from Wyoming and New Mexico having much reduced wings, large head and powerful beak, and long massive legs and constituting with extinct related forms (as Gastornis) an order of birds probably most nearly related to the surviving cariamas and bustards
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