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Glite Dictionary
Ac

Ac

3 9.9
The chemical symbol for the element actinium, a metal that gives off radiation and is found in uranium ore
  • noun
  • /eɪ si/
  • Specialized
translation icon : Ac
  • In the periodic table, Ac stands for actinium, a rare radioactive element.

Examples

  • When examining uranium ores, they found traces of Ac in the samples.

  • The scientist discovered that the Ac he was studying emitted radiation.

  • The farm is around 16 ha (39 ac) but divided into two sites.

    Blog text (3)

  • The excitonic ac Stark effect has been extensively investigated both experimentally and theoretically.

    Academic text (1994)

  • Recently, high levels of Neu5Ac were associated with increased consumption of red meat and as a promoter of systemic inflammation and cancer.

    Academic text (2016)

Surface Forms

Ac singular
Acs plural

Etymology

Ac is the chemical symbol for actinium, and that name comes from the Greek aktis meaning 'ray'. It was called this because actinium gives off strong radiation or 'rays', so thinking of a 'ray' helps you remember that Ac is a radioactive element.