Main entry: focal point, focus, focusing, focussing, direction, centering
Definition: the concentration of attention or energy on something
Usage: the focus of activity shifted to molecular biology; he had no direction in his life
Main entry: focal point, focus
Definition: a point of convergence of light (or other radiation) or a point from which it diverges
Main entry: nidus, focal point, focus
Definition: a central point or locus of an infection in an organism
Usage: the focus of infection