Basin in a Roman Villa That Collected Rainwater
Puzzle 12 of Famous Women in Science Hard Pack
Question is: Basin in a Roman Villa That Collected Rainwater
and the answer is: IMPLUVIUM
Word Meaning:
IMPLUVIUM — (architecture) A low basin in the center of a household atrium, into which rainwater flowed down from the roof through the compluvium.
Definitions from Wiktionary.