Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Of, relating to, or located in the region of the sphenoid bone.
- adjective Resembling a wing; winglike.
- noun Either of two processes descending from the body of the sphenoid bone.
from The Century Dictionary.
- Wing-like or wing-shaped; aliform or alate: specifically applied in anatomy to certain bones or bony processes and associate parts.
- The external pterygoid process is a process or extension of the alisphenoid, or great, wing of the sphenoid bone, having no independent center of ossification, and never being a distinct part.
- The internal pterygoid process, on the other hand, is a distinct bone, the pterygoid proper, having its own center of ossification, and representing the freely articulated pterygoid bone of lower vertebrates. These processes are also distinguished as ectopterygoid and entopterygoid.
- The combined internal and external pterygoid processes, the two parts being distinguished as the internal and external pterygoid plates.
- The pyramidal process, or tuberosity of the palate.
- noun In zoology and anatomy: A bone of the facial part of the skull, forming a part of the hard palate, or pterygopalatal bar, commonly a horizontal rod-like bone, one of a pair on each side of the median line intervening between the palatal and the quadrate bone, or suspensorium of the mandible, and movably articulated with both, frequently also articulating with the basisphenoidal rostrum of the skull: in any mammal, detached from its posterior connection with the suspensorium, and commonly immovably sutured with the palatal and ankylosed with the sphenoid, when it forms the part known in human anatomy as the internal pterygoid process of the sphenoid.
- noun A pterygoid muscle.
- noun plural In entomology, same as
pterygoda .
from the GNU version of the Collaborative International Dictionary of English.
- adjective Like a bird's wing in form.
- adjective Of, pertaining to, or in the region of, the pterygoid bones, pterygoid processes, or the whole sphenoid bone.
- adjective (Anat.) a bone which corresponds to the inner plate of the pterygoid process of the human skull, but which, in all vertebrates below mammals, is not connected with the posterior nares, but serves to connect the palatine bones with the point of suspension of the lower jaw.
- adjective (Anat.) a process projecting downward from either side of the sphenoid bone, in man divided into two plates, an inner and an outer. The posterior nares pass through the space, called the
pterygoid fossa , between the processes.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Resembling a
wing - adjective anatomy Of or pertaining to the
sphenoid bone - noun anatomy A bone which
corresponds to theinner plate of the pterygoidprocess of thehuman skull , but which, in allvertebrates belowmammals , is not connected with theposterior nares , but serves to connect thepalatine bones with the point ofsuspension of the lowerjaw .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Hertwig considered that the following bones were originally formed by coalescence of teeth -- parasphenoid, vomer, palatine, pterygoid, the tooth-bearing part of the pre-maxillary, the maxillary, the dentary and certain bones of the hyo-mandibular skeleton of
Form and Function A Contribution to the History of Animal Morphology
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Certain of these bones he considered to be the substitutes, not the equivalents, of the palatine and pterygoid of other Vertebrates, which are formed from the upper part of the first visceral arch, a part missing in the newt (p. 100).
Form and Function A Contribution to the History of Animal Morphology
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C. External pterygoid process lying on the levator and tensor palati muscles.
Surgical Anatomy Joseph Maclise
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The actual bone of the upper jaw (maxillary) develops outside and separate from the palato-pterygoid bar.
Form and Function A Contribution to the History of Animal Morphology
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Owing to the difference of development he would not homologise these bones in the newt with the palatine and pterygoid of other Vertebrates.
Form and Function A Contribution to the History of Animal Morphology
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Huxley to recognise what are the true homologues of the quadrate, the palatine and the pterygoid in adult bony fish, and to prove that the symplectic and the metapterygoid (tympanal, Cuvier) are bones peculiar to fish.
Form and Function A Contribution to the History of Animal Morphology
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P.ace N.P. at the coccyx, or near it on the spine; and then treat, by firm but momentary touches of the P. P., over the lower maxillary -- _pterygoid_ -- muscles and nerves; indeed, over the _entire_ lower jaw and its articulations.
A Newly Discovered System of Electrical Medication Daniel Clark
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Vesalius gives a good account of the sphenoid bone, with its large and small wings and its pterygoid processes; and he accurately describes the vestibule in the interior of the temporal bone.
Fathers of Biology Charles McRae
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The mandibular arch in the developing fish is abruptly angled, as in the embryo of Tetrapoda; the upper prong of it ossifies into the palatine and pterygoid; at the angle is formed the quadrate (jugal, Cuvier), and to the quadrate is articulated the lower jaw, which ossifies round the lower prong or Meckel's cartilage.
Form and Function A Contribution to the History of Animal Morphology
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Until the seventh or eighth month of fetal life the body of the sphenoid consists of two parts, viz., one in front of the tuberculum sellæ, the presphenoid, with which the small wings are continuous; the other, comprising the sella turcica and dorsum sellæ, the postsphenoid, with which are associated the great wings, and pterygoid processes.
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