ˌdīə.ˈtrīmə noun
Usage: capitalized
Etymology: New Latin, from dia- + Greek tryma, trymē hole
: 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