Synonym of Julian day.

The date and year something or someone was born.

(idiomatic) An inevitable future event or anticipated occurrence, especially in the form of an encounter which is likely to be momentous.

simple past tense and past participle of double date

present participle of double date

The date on which a pregnant woman is expected to give birth. / The date of payment in financial arrangements. / The date by which a book (or other item) borrowed from a library must be returned.

The final date on which a perishable product can be legally sold to the public. / (idiomatic, by extension) Used to indicate that something, or someone, is old and out of date.

(uncountable) A method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock. / (countable) An act of so doing.

Synonym of radioactive dating

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.