Term: tracer: (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: arthropod family: any of the arthropods
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: genus chaenactis: genus of flowering herbs of western United States
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: peanut brittle: brittle containing peanuts
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: wandering albatross: very large albatross; white with wide black wings
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: wood mint: American herb of genus Blephilia with more or less hairy leaves and clusters of purplish or bluish flowers
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: newscast: a broadcast of news or commentary on the news
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: strafer: a combat pilot who strafes the enemy
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: monogenic disorder: an inherited disease controlled by a single pair of genes
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: gaiety: a festive merry feeling
Broader: isotope: one of two or more atoms with the same atomic number but with different numbers of neutrons | Unrelated: cutthroat: someone who murders by cutting the victim's throat