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  2. Sagittal plane - Wikipedia

    en.wikipedia.org/wiki/Sagittal_plane

    The Oxford English Dictionary indicates that sagittal in the sense of the sagittal suture along the vertex of the skull pre-dates other anatomical usage. [7] Sagittal axis or anterior-posterior axis is the axis perpendicular to the coronal plane, i.e., the one formed by the intersection of the sagittal and the transversal planes

  3. Vowel - Wikipedia

    en.wikipedia.org/wiki/Vowel

    There are two complementary definitions of vowel, one phonetic and the other phonological.. In the phonetic definition, a vowel is a sound, such as the English "ah" / ɑː / or "oh" / oʊ /, produced with an open vocal tract; it is median (the air escapes along the middle of the tongue), oral (at least some of the airflow must escape through the mouth), frictionless and continuant. [4]

  4. Articulatory phonetics - Wikipedia

    en.wikipedia.org/wiki/Articulatory_phonetics

    The field of articulatory phonetics is a subfield of phonetics that studies articulation and ways that humans produce speech. Articulatory phoneticians explain how humans produce speech sounds via the interaction of different physiological structures.

  5. Anatomical plane - Wikipedia

    en.wikipedia.org/wiki/Anatomical_plane

    A sagittal plane (also known as anteroposterior plane) is perpendicular to the ground, separating left from right. The median (or midsagittal) plane is the sagittal plane in the middle of the body; it passes through midline structures such as the navel and the spine. All other sagittal planes (also known as parasagittal planes) are parallel to it.

  6. Astigmatism (optical systems) - Wikipedia

    en.wikipedia.org/wiki/Astigmatism_(optical_systems)

    Rays propagating in this plane are called sagittal rays. In third-order astigmatism, the tangential rays (in the tangential plane) and sagittal rays (in the sagittal plane) form foci at different distances along the optic axis. These foci are called the tangent focus and sagittal focus, respectively. In the presence of astigmatism, an off-axis ...

  7. Anatomical terms of location - Wikipedia

    en.wikipedia.org/wiki/Anatomical_terms_of_location

    This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal.

  8. Near-close near-back rounded vowel - Wikipedia

    en.wikipedia.org/wiki/Near-close_near-back...

    Spectrogram of [ʊ] Sagittal section of a vocal tract pronouncing the IPA sound ʊ. Note that a wavy glottis in this diagram indicates a voiced sound. The near-close near-back rounded vowel, or near-high near-back rounded vowel, [1] is a type of vowel sound, used in some spoken languages. The IPA symbol that represents this sound is ʊ . It is ...

  9. Falx cerebri - Wikipedia

    en.wikipedia.org/wiki/Falx_cerebri

    The falx cerebri is a strong, crescent-shaped sheet of dura mater lying in the sagittal plane between the two cerebral hemispheres. [3] It is one of four dural partitions of the brain along with the falx cerebelli, tentorium cerebelli, and diaphragma sellae; it is formed through invagination of the dura mater into the longitudinal fissure between the cerebral hemispheres.