A circular cone the centers of whose sections form a line perpendicular to the bases. When used without qualification, the term "cone" often refers to a right circular cone.
Right Circular Cone
See also
ConeExplore with Wolfram|Alpha
References
Kern, W. F. and Bland, J. R. "Right Circular Cone." §25 in Solid Mensuration with Proofs, 2nd ed. New York: Wiley, pp. 60-64, 1948.Referenced on Wolfram|Alpha
Right Circular ConeCite this as:
Weisstein, Eric W. "Right Circular Cone." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RightCircularCone.html