NEWTON

SI unit of force (6)

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

• Quick crossword No 16,131 — 2022-01-19 00:00:05
  13A: English physicist, remembered for his law of gravitation, d. 1726 (6)
• Quick crossword No 15,570 — 2020-04-01 23:00:34
  24A: SI unit of force (6)