thu·li·um 
(thlē-əm)
(thlē-əm)n. Symbol Tm
A bright, soft, silvery, metallic element of the lanthanide series obtained commercially from the mineral monazite, having an x-ray emitting isotope that is used in portable medical x-ray units. Atomic number 69; atomic weight 168.934; melting point 1,545°C; boiling point 1,950°C; specific gravity 9.321 (at 25°C); valence 2, 3. See Periodic Table.
[After Thule1.]
- paraesthesia
- paraesthesia
- paraffin
- paraffinic
- paraffin series
- paraffin wax
- parafoil
- paraformaldehyde
- paragenesia
- paragenesis
- paragenetic
- paraglider
- paragliding
- paragon
- paragraph
- paragraphic
- paragraphical
- Paraguay
- Paraguayan
- Paraguay River
- Paraguay tea
- para-hydroxybenzoic acid
- parainfluenza
- parajournalism
- parajournalist