selenium

arsenic$\longleftarrow$ 34 $\longrightarrow$bromine

Pronunciation

• (UK) (US) enPR: sĭlēn'ēəm or sĭlēn'ēəm, IPA ^(key): /sɪˈliː.ni.əm/ or /səˈliː.ni.əm/

• Audio (UK)

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Noun

Singular selenium

Plural none

1. (uncountable) Selenium is a nonmetallic (meaning not made of metal) element with an atomic number of 34 and symbol Se.