Clinician definition, a physician or other qualified person who is involved in the treatment and observation of living patients, as distinguished from one engaged in research. See more. Dictionary.com
In geometry, the foci (/ËfoÊsaÉª/ ; singular focus) are a pair of special points with reference to which any of a variety of curves is constructed. For example, foci can be used in defining conic sections, the four types of which are the circle, ellipse, parabola, and hyperbola. In addition, foci are used to define the Cassini oval and the Cartesian oval.
The cross section is the section of the figure after cutting it. (1) Any cross section of a sphere is a circle. (2) A horizontal cross section of a cone is a circle, while its vertical cross section is a triangle. (3) The horizontal cross section of a cylinder is circle and the vertical cross section is a rectangle.