9 letters · 13 points in Scrabble
noun (astronomy) the point in an orbit closest to the body being orbited
originEtymology tree Proto-Indo-European *per-der. Ancient Greek περῐ́ (perĭ́)der. English peri- English apsis English periapsis From peri- + apsis.
Etymology from Wiktionary, CC BY-SA 3.0