pəˈrabələ noun
( -s )
Etymology: New Latin, from Greek parabolē — more at parable
1. : a plane curve generated by a point so moving that its distance from a fixed point divided by its distance from a fixed line is equal to 1 : a conic section formed by the intersection of a cone with a plane parallel to an element of the cone
2.
a. : a bowl-shaped microphone
b. : a bowl-shaped antenna to receive and transmit radio waves preferentially in one particular direction
[s]parabola.jpg[/s] [
parabola 1: F fixed point; CD fixed line; x moving point; AB axis; xy distance from x to CD; pp′ parabola
]