or U 239
When Did The Letter U Enter The Alphabet?There was no letter U in the alphabet. Well, that’s not the entire story. There was the sound for the letter we call U, but it didn’t look like U. It looked like V. The Classical Latin alphabet had only 23 letters, not the 26 that we have today. (This is why the W looks like a double V but is pronounced like a double …
Definition for u-239 (2 of 2)
the uranium isotope with a mass number 239. It is artificially produced by the neutron bombardment of uranium 238.
Also called U-239, U 239.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019