Noun
periapsis in orbit around the moon
Source: WordNetThe CSM and LM separate; the CMP visually inspects the LM, then the LM crew move a safe distance away and fire the descent engine for Descent orbit insertion, which takes it to a perilune of about convert. Source: Internet
Initial lunar orbit insertion was an ellipse with a perilune of convert and an apolune of convert, at an inclination of 12° from the lunar equator. Source: Internet
On January 13 and 14, the perilune was lowered to convert altitude. Source: Internet