Term: rubidium-strontium dating: geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: theory of dissociation: (chemistry) theory that describes aqueous solutions in terms of acids (which dissociate to give hydrogen ions) and bases (which dissociate to give hydroxyl ions); the product of an acid and a base is a salt and water
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: inferior alveolar artery: the alveolar artery that goes through the mandibular canal to supply the lower teeth
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: harassing fire: fire designed to disturb the rest of enemy troops and to curtail movement and to lower enemy morale
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: genocide: systematic killing of a racial or cultural group
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: simaroubaceae: chiefly tropical trees and shrubs with bitter bark having dry usually one-seeded winged fruit
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: slit: a narrow fissure
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: therapeutic abortion: a legally induced abortion for medical reasons (as when the mother's life is threatened)
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: gin sling: a sling made with gin
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: beauty spot: a spot that is worn on a lady's face for adornment
Broader: investigation: the work of inquiring into something thoroughly and systematically | Unrelated: switchman: a man who operates railroad switches