The term conic refers to a type of curve that can be described by an equation of the form Ax^2 Bxy Cy^2 Dx Ey F = 0. The five crossword solutions associated with this term are ELLIPSE (7 letters), Etna (4 letters), PARABOLAS (9 letters), circ (4 letters), and apses (5 letters). An ELLIPSE is a closed curve in which the sum of the distances from two points, called foci, to any point on the curve is constant. Etna is an active stratovolcano located on the east coast of Sicily, Italy. PARABOLAS are U-shaped curves that are symmetrical about a line called the axis of symmetry. Circ is short for circle, which is a closed curve in which all points are equidistant from a fixed point called the center. Apses are the two points on an ELLIPSE or other conic section that are farthest from each other.