Parabola



GRE

解释

GRE 红宝书

• n. 抛物线
• ［英］ 抛物线 ( a curve like the line made by a ball when it is thrown in the air and falls to the ground)

Webster Collegiate

noun

• Etymology: New Latin, from Greek parabolē, literally, comparison
• Date: 1579
• 1. a plane curve generated by a point moving so that its distance from a fixed point is equal to its distance from a fixed line ; the intersection of a right circular cone with a plane parallel to an element of the cone
• 2. something bowl-shaped (as an antenna or microphone reflector)

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