WordNet
uranium 235
n. a uranium isotope with mass number 235; capable of sustaining chain reactions
Usage examples of "uranium 235".
Laboratory tickling of uranium 235 had satisfied the scientists that it would certainly go off with a proper bang in a critical mass.
Lawrence's idea-which he was pusmng with the peculiar force and single-mindedness that made him loved or hated by other scientists-was to produce uranium 235 by separating a stream of ionized molecules of uranium in a magnetic field.
Beyond that was a one-millimeter thickness of uranium 235, which though thin weighed almost as much as the far thicker beryllium.
And they were trying to learn how to assay it, to determine how much uranium 235 there is in it.