Upper Chamber of the Heart, Once Called an Auricle
This page is the CodyCross answer for the clue below from Cruise Ship, Group 644, Puzzle 1 (Cruise Director).
Question is: Upper Chamber of the Heart, Once Called an Auricle
and the answer is: ATRIUM
Word Meaning:
ATRIUM — (architecture) A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings.
Definitions from Wiktionary.