Author: Glossary
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Angle of refraction
The angle formed by a refracted ray of light with a line perpendicular to the surface at the refraction point.
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Pubic angle
The angle formed by the junction of the rami of the pubic bones.
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Parietal angle
The angle formed by the meeting of a line drawn tangent to the maximum curve of the zygomatic arch and a line drawn tangent to the end of the maximum frontal diameter of the skull. If these lines are parallel, the angle is zero; if they diverge, a negative angle is formed. In dentistry, a…
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Ophryospinal angle
The angle formed at the anterior nasal spine by the intersection of lines drawn from the auricular point and the glabella.
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Occipital angle
The angle formed at the opisthion by the intersection of lines from the basion and from the lower border of the orbit.
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Metafacial angle
The angle between the base of the skull and the pterygoid process.
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Angle of jaw
The angle formed where the vertical back edge of the ramus of the mandible meets the horizontal edge along the bottom.
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Angle of incidence
The angle between a ray striking a surface and a line drawn perpendicular to the surface at the point of incidence. The angle at which a ray of light encounters a reflecting or refracting surface.
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Hilgenreiner’s epiphyseal angle
The angle formed by a line drawn through the triradiate and a line drawn through the physes of the femoral head. This angle is normally 25°. Coxa vara is marked by angles greater than 25°; coxa valga by angles less than 25°.
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Gamma angle
The angle between the line of vision and the optic axis.