Selenium
WordNet

noun


(1)   A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
WiktionaryText

Etymology


A word derived by Swedish chemist Berzelius in 1818, from Σελήνη (selēnē, "moon").

Noun


  1. a nonmetallic chemical element (symbol Se) with an atomic number of 34.
 
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