单词 | ratite |
释义 | Word Frequency ratite(ˈrætaɪt) adjective 1. (of flightless birds) having a breastbone that lacks a keel for the attachment of flight muscles 2. of or denoting the flightless birds, formerly classified as a group (the Ratitae), that have a flat breastbone, feathers lacking vanes, and reduced wings noun 3. a bird, such as an ostrich, kiwi, or rhea, that belongs to this group; a flightless bird Word origin C19: from Latin ratis raft |
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