omosternumn.
/əʊməʊˈstəːnəm/, U.S. /ˌoʊmoʊˈstərn(ə)m/ Zoology.
A bone forming part of the cranial end of the sternum in some vertebrates; spec. a short column of bone located between the episternum and the united precoracoids in certain amphibians. Also: an interclavicle (rare).
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the world > life > the body > structural parts > cartilage > cartilage of specific parts > [noun] > of chest or stomach
buckler?1541
ensiform cartilage?1541
plate-bonea1665
omosternum1868
xiphisternum1872
ensiform1907
1868 W. K. Parker Monogr. Struct. & Devel. Shoulder-girdle & Sternum Vertebrata 80 The præ-coracoid bar is larger than the coracoid,..and the ‘omosternum’ and true sternum have not yet made their appearance.
1873 St. G. Mivart Lessons Elem. Anat. iv. 161 The omosternum becomes amongst Mammals very conspicuous in certain Shrews and Mice.
1939 T. L. Green Pract. Animal Biol. i. 135 Draw the pectoral girdle as seen from below and the side noting its general form.., the sternum in the mid-ventral line (episternum, omosternum, xiphisternum and xiphoid cartilage), [etc.].
1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xviii. 265 To the anterior ends of the epicoracoids is attached the bony omosternum, bearing at its anterior end the cartilaginous episternum.
1998 Ann. Anat. 180 113 In the skeleton of D[idelphis] albiventris the omosternum, haemal arches, prepollex, prehallux and parafibula, are present.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1868