metasternumn.

Brit.

/ˌmɛtəˈstəːnəm/, U.S.

/ˌmɛdəˈstərnəm/

Inflections: Plural metasterna, metasternums.

Origin: Formed within English, by derivation. Etymons: meta- prefix, sternum n.

Etymology: < meta- prefix + sternum n. Compare metasternal adj.

1. Entomology. The sternum of the metathorax of an insect.

ΚΠ

1826 W. Kirby & W. Spence Introd. Entomol. III. xxxv. 579 The central part of the mesostethium when elevated or porrected, or otherwise remarkable, is called the metasternum.

1830 Zool. Jrnl. 5 (1835) 150 The metasternum of Audouin is very different from that of Kirby.

1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 130 The labrum and the metasterna are median growths of the sterna of the præoral and post-oral somites.

1910 W. M. Wheeler Ants 21 It is possible to distinguish a metasternum, to which the coxa of the hind-leg is articulated.

1977 O. W. Richards & R. G. Davies Imms's Gen. Textbk. Entomol. (ed. 10) II. 696 Defensive scent glands, opening in the adult on the metepisternum or metasternum.., are characteristic of most Heteroptera.

1991 Jrnl. Zool. 223 233 Variations in..the lengths of the metasternum..and wings are discussed and compared with body lengths in the five species.

†2. Zoology and Anatomy. The most distal portion of the sternum; the xiphisternum or xiphoid process of the sternum. Obsolete.

ΚΠ

1868 W. K. Parker Monogr. Struct. & Devel. Shoulder-girdle & Sternum Vertebrata 123 A supplementary sternal plate (‘metasternum’).

1882 Quain's Elements Anat. (ed. 9) I. 26 The sixth [segment] generally remains cartilaginous for some years after birth,..constituting the ensiform process, or metasternum.

1890 New Sydenham Soc. Lexicon Metasternum, the ensiform process of the sternum.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metasternum
释义	metasternumn. Brit. /ˌmɛtəˈstəːnəm/, U.S. /ˌmɛdəˈstərnəm/ Inflections: Plural metasterna, metasternums. Origin: Formed within English, by derivation. Etymons: meta- prefix, sternum n. Etymology: < meta- prefix + sternum n. Compare metasternal adj. 1. Entomology. The sternum of the metathorax of an insect. ΚΠ 1826 W. Kirby & W. Spence Introd. Entomol. III. xxxv. 579 The central part of the mesostethium when elevated or porrected, or otherwise remarkable, is called the metasternum. 1830 Zool. Jrnl. 5 (1835) 150 The metasternum of Audouin is very different from that of Kirby. 1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 130 The labrum and the metasterna are median growths of the sterna of the præoral and post-oral somites. 1910 W. M. Wheeler Ants 21 It is possible to distinguish a metasternum, to which the coxa of the hind-leg is articulated. 1977 O. W. Richards & R. G. Davies Imms's Gen. Textbk. Entomol. (ed. 10) II. 696 Defensive scent glands, opening in the adult on the metepisternum or metasternum.., are characteristic of most Heteroptera. 1991 Jrnl. Zool. 223 233 Variations in..the lengths of the metasternum..and wings are discussed and compared with body lengths in the five species. †2. Zoology and Anatomy. The most distal portion of the sternum; the xiphisternum or xiphoid process of the sternum. Obsolete. ΚΠ 1868 W. K. Parker Monogr. Struct. & Devel. Shoulder-girdle & Sternum Vertebrata 123 A supplementary sternal plate (‘metasternum’). 1882 Quain's Elements Anat. (ed. 9) I. 26 The sixth [segment] generally remains cartilaginous for some years after birth,..constituting the ensiform process, or metasternum. 1890 New Sydenham Soc. Lexicon Metasternum, the ensiform process of the sternum. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1826
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