| 单词 | movable rib |
| 释义 | > as lemmasmovable rib movable rib n. †(a) Anatomy each of the four ribs of the eleventh and twelfth pairs in the human, which are not attached to the sternum ventrally; a floating rib (obsolete rare); (b) Zoology (in tetrapods) a rib that is capable of being moved, esp. one that is free at the ventral end. ΚΠ 1835 R. Owen in Todd's Cycl. Anat. & Physiol. I. 280/2 If the moveable ribs had commenced as in Mammalia, by extending to the sternum. 1880 Philos. Trans. (Royal Soc.) 171 1047 In the skeleton of Moloch horridus..there are 21 vertebræ between the skull and sacrum; of these, 14 support movable ribs. 1944 Sci. Monthly Aug. 125/2 These membranes [in the flying lizard] are distended partly by the limbs but mainly by the movable ribs. 1989 Science 22 Dec. 1593/2 Most air-breathing fishes, lacking the diaphragm or movable ribs thought necessary for aspiration breathing, use a buccal pulse pump. < as lemmas |
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