单词	hyperon
释义	hyperon /ˈhʌɪp(ə)rɒn / noun Physics An unstable subatomic particle classified as a baryon, heavier than the neutron and proton.The baryon classification took on new members, including particles more massive than the proton called hyperons.... We now call these particles ‘kaons’ and ‘lambda hyperons,’ but at the time they were simple ‘strange particles.’ The lightest particles were named leptons, those with medium mass, mesons, heavier particles were called baryons, and the heaviest particles of all, hyperons. Origin 1950s: from hyper- 'beyond, over' + -on.
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