ratite

1. A ratite bird order: cassowaries and emus.
   平胸类鸟目之一；食火鸡和鸸鹋。
2. A ratite bird order: ostriches and related extinct birds; known from the Pleistocene onward.
   平胸鸟目之一；鸵鸟及与其有关的现已灭绝的鸟类；生活于洪积世以前。
3. Used in former classifications to include all ratite bird orders.
   用于过时的分类法中，包含所有的平胸鸟目。
4. A ratite bird order: recently extinct flightless birds of New Zealand.
   平胸鸟目；产于新西兰最近灭绝的不会飞的鸟类。
5. For the kiwi is a ratite.
   因为奇异鸟是平胸鸟的一种。
6. A ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis.
   一种平胸鸟目；小眼睛长嘴且翅膀已退化的不会飞的鸟类几维。
7. A ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas.
   平胸类鸟目之一；介于鸵鸟与鸸鹋之间；近来灭绝的美洲鸵。

noun

1. flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches

   Synonym:    ratite birdflightless bird