__ Zero, the Lowest Possible Temperature
This page is the CodyCross answer for the clue below from Tracking Time, Group 1046, Puzzle 2 (Once Upon a Time).
Question is: __ Zero, the Lowest Possible Temperature
and the answer is: ABSOLUTE
Word Meaning:
ABSOLUTE — Free of restrictions, limitations, qualifications or conditions; unconditional.
Definitions from Wiktionary.