Term: thulium: 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
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: genus aralia: type genus of Araliaceae; large widely distributed genus of shrubs and trees and vines: spikenard; Hercules'-club
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: apar: South American armadillo with three bands of bony plates
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: invariance: the nature of a quantity or property or function that remains unchanged when a given transformation is applied to it
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: health care: social insurance for the ill and injured
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: wind: the act of winding or twisting
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: telephone system: a communication system that transmits sound between distant points
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: propeller: a mechanical device that rotates to push against air or water
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: chondrite: a rock of meteoric origin containing chondrules
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: leaf spring: long narrow spring consisting of several layers of metal springs bracketed together
Broader: metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. | Unrelated: bombardon: a large shawm; the bass member of the shawm family