Answer:

FOCI

Answer	Crossword Clue
FOCI	Central points
FOCI	Geometry points
FOCI	Centers, of a sort

FOCI	Defining points for an ellipse
FOCI	Centers of activity
FOCI	Rays' meeting places
FOCI	Points of convergence
FOCI	Crucial points
FOCI	Centering points
FOCI	An ellipse has two
FOCI	Meeting points

FOCI	Points of concentration
FOCI	Centers of attention
FOCI	Convergence points
FOCI	Convergent points
FOCI	Meeting places?
FOCI	Points
FOCI	Points of interest
FOCI	Converging points

FOCI	Meeting places
FOCI	Ellipse points
FOCI	Hubs
FOCI	Ellipse pair
FOCI	Ellipse twosome
FOCI	Hyperbola pair
FOCI	Central points.
FOCI	Points of concentration.

FOCI	Central points of attention.
FOCI	Converging points.
FOCI	Centers of activity.
FOCI	Meeting points of reflected rays.
FOCI	Points of convergence.
FOCI	Centers of interest.
FOCI	Centers of attraction
FOCI	Primary points

FOCI	Centers; hubs
FOCI	Earthquakes' points of origin
FOCI	Origins of earthquakes
FOCI	An ellipse has two of them
FOCI	Points that may have rays