WordNet: focal point, focus

a point of convergence of light (or other radiation) or a point from which it diverges

• hypernym point

focal point

• (suomi) polttopiste (synonyymi)

focus

• (englanti) focus (derivationally related)

• (englanti) focus (derivationally related)

• (englanti) focal (derivationally related)
• (suomi) fokus (synonyymi)