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  2. 4-polytope - Wikipedia

    en.wikipedia.org/wiki/4-polytope

    Just as a 3D shape can be projected onto a flat sheet, so a 4-D shape can be projected onto 3-space or even onto a flat sheet. One common projection is a Schlegel diagram which uses stereographic projection of points on the surface of a 3-sphere into three dimensions, connected by straight edges, faces, and cells drawn in 3-space. Sectioning

  3. Distinctive feature - Wikipedia

    en.wikipedia.org/wiki/Distinctive_feature

    In linguistics, a distinctive feature is the most basic unit of phonological structure that distinguishes one sound from another within a language.For example, the feature [+voice] distinguishes the two bilabial plosives: [p] and [b] (i.e., it makes the two plosives distinct from one another).

  4. List of diglossic regions - Wikipedia

    en.wikipedia.org/wiki/List_of_diglossic_regions

    As English is one of the two official languages of Pakistan, the other being Urdu, there is a degree of diglossia between the upper and middle and lower classes. The upper and upper-middle classes tend to be educated in English medium schools whereas the lower class are schooled in either Urdu or one of the regional languages (usually Pashto or ...

  5. List of materials properties - Wikipedia

    en.wikipedia.org/wiki/List_of_materials_properties

    A ductile material must have a high degree of plasticity and strength so that large deformations can take place without failure or rupture of the material. In ductile extension, a material that exhibits a certain amount of elasticity along with a high degree of plasticity. [3] Durability: Ability to withstand wear, pressure, or damage; hard-wearing

  6. Zonohedron - Wikipedia

    en.wikipedia.org/wiki/Zonohedron

    In geometry, a zonohedron is a convex polyhedron that is centrally symmetric, every face of which is a polygon that is centrally symmetric (a zonogon).Any zonohedron may equivalently be described as the Minkowski sum of a set of line segments in three-dimensional space, or as a three-dimensional projection of a hypercube.

  7. Syllable - Wikipedia

    en.wikipedia.org/wiki/Syllable

    They are sometimes collectively known as the shell. The term rime covers the nucleus plus coda. In the one-syllable English word cat, the nucleus is a (the sound that can be shouted or sung on its own), the onset c, the coda t, and the rime at. This syllable can be abstracted as a consonant-vowel-consonant syllable, abbreviated CVC.

  8. 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.

  9. Major scale - Wikipedia

    en.wikipedia.org/wiki/Major_scale

    The intervals from the tonic (keynote) in an upward direction to the second, to the third, to the sixth, and to the seventh scale degrees of a major scale are called major. [1] A major scale is a diatonic scale. The sequence of intervals between the notes of a major scale is: whole, whole, half, whole, whole, whole, half