kepler's second law: a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times
kepler's law: (astronomy) one of three empirical laws of planetary motion stated by Johannes Kepler
mephenytoin: a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective