A Glass-Enclosed Room That Lets in Sunlight
This page is the CodyCross answer for the clue below from Apothecary, Group 1980, Puzzle 1 (Research Trials).
Question is: A Glass-Enclosed Room That Lets in Sunlight
and the answer is: SOLARIUM
Word Meaning:
SOLARIUM — (chiefly US and Canada) A room, rooftop, balcony, or terrace, used for its abundant sunlight, especially when used as a medical treatment.
Definitions from Wiktionary.