Nearby Words

charmonium

[chahr-moh-nee-uhm]

char·mo·ni·um

[chahr-moh-nee-uhm]
noun Physics.
any meson composed of a charmed quark and a charmed antiquark.

Origin:
1970–75; charm1 + -onium, probably extracted from positronium
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Charmonium is always a great word to know.
So is x-ray. Does it mean:
the ability of a substance to flow; a measure of this ability, the reciprocal of the coefficient of viscosity
a form of electromagnetic radiation of shorter wavelength than light and capable of penetrating solids and of ionizing gases
Collins
World English Dictionary
charmonium (tʃɑːˈməʊnɪəm)
 
n , pl -nia
physics an elementary particle that contains an antiquark and a charm quark
 
[C20: from charm (sense 7)]

Collins English Dictionary - Complete & Unabridged 10th Edition
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