Most carbon atoms have six protons and six neutrons in their nuclei and are called carbon 12. But a tiny percentage of carbon is made of carbon 14, or radiocarbon, which has six protons and eight neutrons and is not stable: half of any sample of it decays into other atoms after 5,700 years.Carbon 14 is continually being created in the Earth's atmosphere by the interaction of nitrogen and gamma rays from outer space.
A form of radiometric dating used to determine the age of organic remains in ancient objects, such as archaeological specimens, on the basis of the half-life of carbon-14 and a comparison between the ratio of carbon-12 to carbon-14 in a sample of the remains to the known ratio in living organisms. A technique for measuring the age of organic remains based on the rate of decay of carbon 14. Yet even here there is to be seen a relative diminution of the higher pay. This proprietor was a man of great opulence, and a relative of Naomi. Do you know, sir, that I am the friend and relative of that sick gentleman? Relativism in philosophy first recorded 1865 (relativist is from 1863). of referre "to refer." Meaning "person in the same family" first recorded 1657; the adj. Relatively "in relation to something else" is recorded from 1561.
Newton included in the "Principia Mathematica" a scholium, or an appendix of explanatory notes, and in it he defined several important principles, including the idea of absolute time.