Term: tracer: (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: secretary of housing and urban development: the person who holds the secretaryship of the Department of Housing and Urban Development
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: fence-sitter: a person who won't take sides in a controversy
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: cystitis: inflammation of the urinary bladder and ureters
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: lagerstroemia: shrubs or small trees of tropical Asia and Africa usually with showy white, pink, or purplish flowers
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: mother-in-law's tongue: stemless plant having narrow rigid leaves often cultivated as a houseplant
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: mellowness: a taste (especially of fruit) that is ripe and of full flavor
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: mesophyte: land plant growing in surroundings having an average supply of water; compare xerophyte and hydrophyte
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: occupation license: a license to pursue a particular occupation
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: latimeria: type genus of the Latimeridae: coelacanth
Broader: radioisotope: a radioactive isotope of an element; produced either naturally or artificially | Unrelated: pruritus: an intense itching sensation that can have various causes (as by allergies or infection or lymphoma or jaundice etc.)