from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A big-beaked prehistoric bird in the genus Gastornis which is larger than the ostrich. They supposedly died out 15- to 25-million years ago due to a vast climate change.
from the GNU version of the Collaborative International Dictionary of English
- n. An extinct eocene bird from New Mexico, larger than the ostrich.
from The Century Dictionary and Cyclopedia
- n. A genus of gigantic ratite fossil birds from the Wahsatch group of the Eocene of New Mexico, supposed to be the same as Gastornis (which see). The type-species is D. gigantea. Cope.
Ancient Greek διατρήμα (diatrēma, "canoe"). (Wiktionary)