apsis

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a domed or vaulted recess or projection on a building especially the east end of a church;
usually contains the altar
• Syn:
apse
• Derivationally related forms:
apsidal (for: apse)
• Hypernyms:
recess, niche
• Hyponyms:
tribune
• Part Holonyms:
church, church building