ABSOLUTEZERO

You can't get colder than this (8,4)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 16,698 — 2023-11-11 00:00:19
  11A: -273.15 Celsius (8,4)
• Quick crossword No 15,837 — 2021-02-09 00:00:56
  11A: You can't get colder than this (8,4)