back dating
21Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …
22Online dating service — Online dating or Internet dating is a dating system which allows individuals, couples and groups to make contact and communicate with each other over the Internet, usually with the objective of developing a personal, romantic, or sexual… …
23Radiocarbon dating — (sometimes simply known as carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon 14 (14C) to estimate the age of carbon bearing materials up to about 58,000 to 62,000 years.[1] Raw, i.e. uncalibrated …
24College and university dating — College dating is the set of behaviors and phenomena centered around the seeking out and the maintenance of romantic relationships in a university setting. It has unique properties that only occur, or occur most frequently, in a campus setting.… …
25Lead-lead dating — is a method for dating geological samples, normally based on whole rock samples of material such as granite. For most dating requirements it has been superseded by uranium lead dating (U Pb dating), but in certain specialized situations (such as… …
26Amino acid dating — is a technique used to estimate age in a wide variety ofsituations. This technique relates changes in amino acid molecules to thetime elapsed since they were formed. This technique is used in paleobiology, archaeology, forensic science, and… …
27Dates and Dating — • In classical Latin even before the time of Christ it was usual for correspondents to indicate when and where their letters were written Catholic Encyclopedia. Kevin Knight. 2006. Dates and Dating Dates and Dating …
28True (dating service) — True is an online dating service that was founded in 2003 by entrepreneur Herb Vest. Its original name was TrueBeginnings.com, but the company felt that this name was too limiting, as company leadership wanted to expand the company into other… …
29date back to — phrasal verb [transitive] Word forms date back to : present tense I/you/we/they date back to he/she/it dates back to present participle dating back to past tense dated back to past participle dated back to date back to something to be made or… …
30date back to — ˌdate ˈback to [transitive] [present tense I/you/we/they date back to he/she/it dates back to present participle dating back to past tense dated back to …
