focus

A point where converging rays or lines meet.

focus
fŏcus, i, m. [root bha-, to be bright, Gr. φα- (cf. for, fari), strengthened, fac-, fax, facies, etc...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
focus
focus ī, m 1 FAC-, a fire-place, hearth : ligna super foco reponens, H.: ad focum sedens: exstruer...

An Elementary Latin Dictionary
Focus
·noun A central point; a point of concentration. II. Focus ·vt To bring to a focus; to <<Focalize>>...

Webster's Dictionary of the English Language