THULIUM as NOUN

1. Meaning
   • a soft silvery metallic element of the rare earth group
   • isotope 170 emits X-rays and is used in small portable X-ray machines
   • it occurs in monazite and apatite and xenotime
   Synonym(s)
   • atomic number 69 (what does atomic number 69 mean?)
   • Tm (what does Tm mean?)
   Hypernyms(s) thulium is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • metallic element (what does metallic element mean?)
   • metal (what does metal mean?)