parabolical : Idioms & Phrases

• a paraboloid; a conoid whose directing curve is a parabola. See Conoid.

Webster 1913

• noun a parabolic reflector for light radiation
  

WordNet

• (Opt.), a mirror having a paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes.

Webster 1913

• the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis.

Webster 1913

• a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola.

Webster 1913