vomer

Definitions

  • WordNet 3.6
    • n vomer thin trapezoidal bone of the skull forming the posterior and inferior parts of the nasal septum
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Webster's Revised Unabridged Dictionary
    • n Vomer (Anat) A bone, or one of a pair of bones, beneath the ethmoid region of the skull, forming a part a part of the partition between the nostrils in man and other mammals.
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Century Dictionary and Cyclopedia
    • n vomer A genus of carangoid fishes found in warm seas.
    • n vomer In zoology and anatomy, a bone of the skull of most vertebrates; a membrane-bone or splint-bone developed in the median line of the skull, beneath the basicranial axis, primitively consisting of paired halves, which sometimes remain separate, one on each side of the middle line. Its special shapes and connections are extremely variable in the vertebrate series; in general,it is situated below or in advance of the basisphenoid, below or behind the mesethmoid, and between the maxillary, palatine, or pterygoid bones of opposite sides, serving thus as a septum between right and left nasal or nasopalatine passages. In man the vomer is plowshareshaped, articulating with the sphenoid behind, the mesethmoid above, the palatal plates of the maxillary and palatal bones below, and the triangular median cartilage of the nose in front; it thus forms much of the nasal septum, or partition between right and left nasal cavities, its posterior free border definitely separating the posterior nares. In birds its extremely variable shapes and connections furnish valuable zoölogical characters. (See ægithognathous, and cuts under desmognathoiis, dromæognathous. saurognnthous. and schizoynathous.) The vomer is by Owen regarded as the centrum of the fourth or rhinencephalic cranial vertebra—a view now entertained by few, it being generally regarded as a mere splint-bone. It is wanting in many vertebrates. The so-called vomer of fishes and batrachians is not homologically the bone of that name in higher vertebrates, but is identified by some with the parasphenoid (which see, with cut); while others name the ichthyic vomer the anteal bone. It often bears teeth. See cuts under Chelonidæ, craniofacial, Cyclodus, Gallinæ, Lepidosiren, Ophidia, parasphenoid, Physeter, Pythonidæ, Rana, teleost, and Thinocoridæ.
    • n vomer In ornithology, the pygostyle or rump-post; the large, peculiarly shaped terminal bone of the tail of most birds, consisting of several ankylosed vertebræ. See cut under pygostyle.
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Chambers's Twentieth Century Dictionary
    • n Vomer vō′mėr the thin flat bone forming part of the middle partition of the nose, separating the nostrils.
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Etymology

Webster's Revised Unabridged Dictionary
L., a plowshare
Chambers's Twentieth Century Dictionary
L., 'a ploughshare.'

Usage

In literature:

In the ventral view of the skull (Figure 4) we see a pair of vomers (vo.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells
The nasal fossae are situated on either side of the median partition formed by the vomer and cartilaginous nasal septum.
"Surgical Anatomy" by Joseph Maclise
Fessis vomere tauris Praebes, et pecori vago.
"The Works of Lord Byron, Volume 2" by George Gordon Byron
The vomer is single, or absent, in the Aglossa.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 4" by Various
The nasal bones which, together with the vomer, form the nose, are likewise dermal bones, and so are the pterygoids and palatines.
"Degeneracy" by Eugene S. Talbot
The vomer is approximately U-shaped, when viewed from below.
"A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)" by John Wellman
The vomers are moderately large and are in contact anteriorly with the premaxillaries and posteriorly with the ethmoid.
"Neotropical Hylid Frogs, Genus Smilisca" by William E. Duellman
The true Dolphins also appear to show the same intervention of the vomer in a few cases.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard
The vomer broad, flat, and three-pointed in front.
"Trees. A Woodland Notebook" by Herbert Maxwell
The vomer broad, flat, and three-pointed in front.
"Extinct Birds" by Walter Rothschild
The floor of the cranium on its oral aspect is ensheathed by the large parasphenoid and the smaller vomer in front of and overlapping it.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 3" by Various
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