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What the H of the particle-smashing LHC stands for (6)

Ross

I believe the answer is:

hadron

(Other definitions for hadron that I've seen before include "Tiniest thing" , "Subatomic particle" , "A tiny thing" , "The Collider at Cern" , "Large -- Collider" .)

I've seen this clue in The Times and The Sunday Times.
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