Noun
a-c (uncountable)
(electricity) Initialism of alternating current.
In 2006, 5,900 pupils in Somerset sat GCSE examinations, with 44.5% achieving 5 grades A-C including English and Maths (compared to 45.8% for England). Source: Internet
It is available in three colours – black and two shades of pink – and is best for cups A-C. Source: Internet