radiocarbon dating
— Noun
– English
～ a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon 14; believed to be reliable up to 40,000 years
radiocarbon
— Noun
– English
～ a radioactive isotope of carbon
radiocarpal joint
— Noun
– English
～ a joint between the distal end of the radius and the proximal row of carpal bones