¦perēˌ noun
Etymology: New Latin, from peri- + apsis
: the apsis nearest the center of attraction : the low point in an orbit — compare apoapsis herein
¦perēˌ noun
Etymology: New Latin, from peri- + apsis
: the apsis nearest the center of attraction : the low point in an orbit — compare apoapsis herein
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012