Crossword Genius

He enunciated law of gravity (6)

Ross

I believe the answer is:

newton

(Other definitions for newton that I've seen before include "Gravity theorist" , "Unit of force - English polymath, d. 1727" , "Great English mathematician who discovered gravity" , "Scientist - unit of force" , "Famous mathematician" .)

I've seen this clue in the Sydney Morning Herald.
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