7 letters · 10 points in Scrabble
noun a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar
originFrom Ancient Greek ἁψῖδες (hapsîdes, “apsides”) (plural form), from Ancient Greek ἁψίς (hapsís) (singular form). * apside + -s
Etymology from Wiktionary, CC BY-SA 3.0