thulium

noun

chemical element with the atomic number of 69

Wiktionary

Pronunciation: /ˈθjuːliəm/ / /ˈθuːliəm/

noun

Etymology: Etymology tree English Thule Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English thulium From Thule (a poetic name for Scandinavia) + -ium.

A metallic chemical element (symbol Tm) with atomic number 69: a fairly soft, easily workable metal with a bright silvery-gray lustre.