noun-modifying (irregular)
parabolic
Technical mathematical term used prenominally, as in 放物線 (parabola) or 放物運動 (parabolic motion).
放物線の方程式を導出する。
Derive the equation of the parabola.
放物運動の軌跡を計算した。
I calculated the trajectory of the parabolic motion.
放物線 is the full noun meaning 'parabola', while 放物 is the prenominal form used in compounds.
Compound of 放 (release, throw) and 物 (thing), likely a calque from Western mathematical terminology. The exact historical derivation is uncertain.