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se·le·ni·um

n :  a nonmetallic element that resembles sulfur and tellurium chemically, causes poisoning in range animals when ingested by eating some plants growing in soils in which it occurs in quantity, and occurs in allotropic forms of which a gray stable form varies in electrical conductivity with the intensity of its illumination and is used in electronic devices - symbol Se - see ELEMENTtable   .
 
 
 
Similar sounding terms:  so·la·num 

 
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