The story
modelled on actino-uranium (the uranium parent of actinium), as it was the hypothetical uranium parent of thorium
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Uranium-236. Full definition →
modelled on actino-uranium (the uranium parent of actinium), as it was the hypothetical uranium parent of thorium
Etymology from Wiktionary, CC BY-SA 4.0.