from The Century Dictionary.

  • One of the prime divisions of birds, including the ostriches, cassowaries, emus, and kiwis; the group of struthious birds, as contrasted with Carinatæ, to which all other existing birds belong.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Zoöl.) An order of birds in which the wings are small, rudimentary, or absent, and the breastbone is destitute of a keel. The ostrich, emu, moa, and apteryx are examples.


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