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.
As you read through a section of text in a book, the highlighted section stands out, causing you to focus your interest on that area. Attention allows you to tune out information, sensations, and perceptions that are not relevant at the moment and instead focus your energy on the information that is important.