rubidium-strontium dating
— Noun
– English
~ 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
Revolutionary People's Struggle
— Noun
– English
~ an extreme leftist terrorist group formed in Greece in 1971 to oppose the military junta that ruled Greece from 1967 to 1974; a revolutionary group opposed to capitalism and imperialism and the United States