WordWeb Online

1. A point of convergence of light (or other radiation) or a point from which it diverges
   - focus
    
2. A central point or locus of an infection in an organism
   "the focal point of infection";
   - focus, nidus
    
3. The concentration of attention or energy on something
   "the focal point of activity shifted to molecular biology";
   - focus, focusing, focussing, direction, centering [US], centring [Brit, Cdn]

Derived forms: focal points

Type of: absorption, concentration, engrossment, immersion, point

Part of: focal infection

Encyclopedia: Focal point