(archaeology) Helium dating.

(archaeology) a method of determining the age of rock that depends on the production of helium during the decay of various radioactive isotopes of uranium and thorium.

plural of double date

An organized event in which prospective romantic partners engage in a series of one-to-one meetings in a library, based around the topic of favourite books.

plural of call date

simple past tense and past participle of double date

present participle of double date

plural of date of birth

plural of date of birth

The process of determining the age of a material by estimating the amount of radioactive decay of one or more radioisotopes present in the material when it was formed.