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.
Table of conics, Cyclopaedia , 1728 In mathematics , a conic section (or simply conic ) is a curve obtained as the intersection of the surface of a cone with a plane . The three types of conic section are the hyperbola , the parabola , and the ellipse .