1. 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
   - thulium, atomic number 69

Type of: metal, metallic element

Part of: apatite, monazite, xenotime

Encyclopedia: Tm

• depersonalise
• depersonalization
• depersonalization disorder
• depersonalization neurosis
• depersonalize
• dephlegmator
• depict
• depicted
• depicted object
• depicting
• depiction
• depictive
• depigmentation
• depilate
• depilation
• depilator
• depilatory
• depilous
• deplane
• depletable
• deplete
• depleted
• depletion
• depletive
• deplorable