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Symbol for carbon 14.

carbon-14 (14C)

a beta-emitter with a half-life of about 5700 years. It occurs naturally, arising from cosmic rays, and is used as a tracer in studying various aspects of metabolism and in dating relics that contain natural carbonaceous materials. Compare carbon-11.


A natural beta-emitting radioisotope of carbon that has a T1/2 of 5720 years, which decays to 14N. It has been used as a biotracer and in anthropology for dating carbon-rich materials, especially newer fossils, and can determine the age of carbon-based materials up to 60,000 years old.
References in periodicals archive ?
Cardiff could climb to 18C to 19C on Thursday, while the coast will be cooler with St Davids, in Pembrokeshire, Aberystwyth, in Ceredigion, and Holyhead, on Anglesey, all reaching no higher than 13C to 14C.
Accompanying this weather will be cold northerly wind which will make it feel very chilly - probably about 14C (57F).
In fact, my nephew's homework dittos had such romantic titles as "Level 1, Lesson 14 Standardized Test 14C.
Holocene period 14C dates can be calibrated by means of dendrochronology (Stuiver et al.
Designed specifically for isotopes such as 14C, 33P and 35S, the screens provide high sensitivity and improved spatial resolution for life scientists looking to further reduce or eliminate the use of film in protein and nucleic acid imaging applications.
57C above the long-ter average of 14C - and 2015 is currently running at 0.
Carbon is composed of three different isotopes - 14C, 13C and 12C of which 12C is the most common and 14C (used for dating purposes) is only about one in a trillion atoms.
Sofia will see improved sunny and dry weather on Saturday with highs of 22C and lows of 14C.
He said the water temperature was around 14C (57F).
Porthcawl: A sunny day and 14C maximum temperature.
Cheese is best kept in a cool, dark place such as a cellar or a larder, ideally between 10C and 14C.
24 /Xinhua-PRNewswire-FirstCall/ -- Gulf Resources (BULLETIN BOARD: GUFR) announced today that it filed a Preliminary Schedule 14C Information Statement (PRE 14C) with the Securities and Exchange Commission (SEC) to announce that the Company intends to effect a two-for-one forward stock split of the issued and outstanding share of the Company's Common Stock and to increase the number of authorized shares of Common Stock from 70 million to 400 million.