Reference meaning
Fr
Last updated
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Related source terms
franciumatomic number 87
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 14637864-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.