B meson
noun Physics.
a meson composed of a bottom quark and an up or down antiquark or of a bottom antiquark and an up or down quark.
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The Letter B Once Had A Much Longer NameThe letter B was part of the Phoenician alphabet more than 3000 years ago in 1000 BCE. At that time, the letter was called beth and looked a little different, but it made the sound of b and was second in the alphabet. The shape of the letter resembled the floor plan of a house, and the word beth meant “house.” This is pictured below. In Hebrew, the letter was called beth, bet, or bayt which also …
Also called B particle.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019