| 单词 | raft-breasted | 
| 释义 | > as lemmasraft-breasted   raft-breasted adj. Ornithology (now rare) (of a bird) having no keel to the sternum; ratite. ΚΠ 1890    Cent. Dict.  				Raft-breasted, ratite. 1891    Geol. Mag. 8 379  				These Ratite, or raft-breasted flightless birds, have been found in a fossil state in England, France, India, Madagascar, New Zealand, Australia, and America. 1964    T. J. Parker  & W. A. Haswell Text-bk. Zool. 		(ed. 7)	 II. 606  				Several flying birds in specialised habitats have lost the carinate condition, and become raft-breasted in varying degree along with the abandonment of flying. < as lemmas  | 
	
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