SINUS

Air-filled cavity in the skull (5)

Solution has appeared in 4 crosswords (0 across and 4 down):

• Quick crossword No 16,399 — 2022-11-28 00:00:09
  15D: Hole in the head? (5)
• Quick crossword No 15,974 — 2021-07-18 23:00:42
  13D: Cavity in the bones of the skull (5)
• Quick crossword No 15,848 — 2021-02-22 00:00:14
  13D: Passage connecting to nasal cavities (5)
• Quick crossword No 15,501 — 2020-01-13 00:00:49
  18D: Air-filled cavity in the skull (5)