Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A probable chemical element discovered by Sir William Crookes in 1898. Its nitrate is obtained byy practical decomposition and crystallization of yttrium nitrate. At. wt., about 117.

from The Century Dictionary and Cyclopedia

  • n. The second name given by Sir William Crookes to a supposed new chemical element of the yttrium group which he had at first called monium.

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