| 释义 |
‖ metasternum|mɛtəˈstɜːnəm|
[mod.L., f. meta- + sternum.]
1. Ent. The median ventral piece of the metathorax in insects.
1826Kirby & Sp. Entomol. III. xxxv. 579 The central part of the mesostethium when elevated or porrected, or otherwise remarkable, is called the metasternum. 1838Westwood Entom. Text-bk. 272 The under surface of..the metasternum is generally a horny covering.
2. Anat. The xiphisternum or ensiform appendage.
1868W. K. Parker Shoulder-girdle Vertebr. 123 A supplementary sternal plate (‘metasternum’). 1884Distant in Proc. Zool. Soc. 460 Disks of meso- and metasternums pitchy. 1890in Syd. Soc. Lex.
Hence metaˈsternal a., pertaining to the metasternum; n. a metasternal plate.
1826Kirby & Sp. Entomol. III. xxxv. 579 The Tettigoniæ F. have usually a distinct metasternal point between their hind-legs. 1868W. K. Parker Shoulder-girdle Vertebr. 121 These plates are rudimentary ‘meta-sternals’. 1873Le Conte Classif. Lepidoptera N. Amer. ii. 312 Metasternal pores distinct. |