A silvery metallic chemical element (symbol Y) with an atomic number of 39, mainly found in combination with lanthanide elements in rare-earth minerals.
Pronounced as (IPA)
/ˈɪtɹiːəm/
Etymology
From Ytterby + -ium, named after Ytterby, Sweden, the same etymological source as terbium, erbium, and ytterbium.