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.
A conic section(or simply conic) can be described as the intersection of a plane. and a double-napped cone. Notice from Figure B.1 that in the formation of the four. basic conics, the intersecting plane does not pass through the vertex of the cone. When. the plane does pass through the vertex, the resulting figure is a degenerate conic,as.