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Hadean eon
Hades
Hadhramaut
Hadith
hadj
hadn’t
Hadramaut
Hadrian’s Wall
hadron
hadrosaur
hadst
haecceity
Haeckel’s law
haem
haema-, etc.
-haemia
hafiz
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hadron
had·ron [ háddrən, hád ròn ] (plural had·rons)


noun 
Definition:
 
subatomic particle: an elementary particle that is made up of gluons or quarks or both and participates in the strong interaction
[Mid-20th century. < Greek hadros "bulky"]

had·ron·ic [ ha drónnik, hə drónnik ] adjective
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