- 1. pl. of Focus Source: opted
- 2. n the concentration of attention or energy on something n maximum clarity or distinctness of an image rendered by an optical system n maximum clarity or distinctness of an idea n a central point or locus of an infection in an organism n special emphasis attached to something n a point of convergence of light (or other radiation) or a point from which it diverges n a fixed reference point on the concave side of a conic section Source: ecdict
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foci
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