premaxillan.
/ˌpriːmakˈsɪlə/, U.S. /ˌprimækˈsɪlə/ Chiefly Zoology.
A premaxillary bone.
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the world > animals > animal body > general parts > constituent materials > [noun] > jawbone
premaxillary1839
premaxilla1850
1850 R. Owen in Philos. Trans. (Royal Soc.) 140 493 The tooth at the fore part of the maxilla, or the maxillary part of the upper jaw which coalesces with the premaxilla in Man, is called the ‘canine’.
1866 T. H. Huxley in S. Laing Pre-hist. Remains Caithness 95 The alveolar surface of the premaxillae is nearly perpendicular.
1873 St. G. Mivart Lessons Elem. Anat. iii. 115 The second element of the human maxillary bone..is termed in zootomy the pre-maxilla.
1903 Science 3 July 26/2 The larger skull measured twelve inches from the occipital ridge to the premaxilla.
1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xvii. 237 The upper jaw is supported on either side by two movable bones, the premaxilla in front and the maxilla behind.
1995 J. S. Ryland in P. J. Hayward & J. S. Ryland Handbk. Marine Fauna N.W. Europe xiv. 713 In fairly primitive bony fishes, such as salmonids, skull features include the delimitation of the upper jaw by two tooth-bearing bones, the premaxilla and maxilla.
This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).
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