ATOMIC NUMBER 34

 I. (noun) 

Sense 1

Meaning:

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)

Synonyms:

atomic number 34; Se; selenium

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 34" is a kind of...):

chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)

antioxidant (substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides)

Holonyms ("atomic number 34" is a substance of...):

fool's gold; iron pyrite; pyrite (a common mineral (iron disulfide) that has a pale yellow color)

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