thallium

English dictionary entry

Meanings

noun

A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
A single atom of this element.

Pronunciation

thăl'ēəm /ˈθæliəm/ LL-Q1860 (eng)-Vininn126-thallium.wav LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-thallium.wav

Word forms

thallium thalliums

Etymology

Coined based on Ancient Greek θαλλός (thallós, “green branch”) (after the color of the radiation spectra), + -ium.

Related words

Derived words

eka-thallium thallane thallic thalliferous thallious thallium-activated thallium glass thallium green thallium hydroxide thallium line thallium monofluoride thallium monoxide thallium oxide thallium sulfate thallium sulphate thallium sulfide thallium sulphide thallium trioxide thallous thall- thallo-

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