(aviation) Initialism of absolute ceiling. / Initialism of access control. / (finance) Initialism of account current. / (anatomy) Initialism of anterior chamber.

(anatomy, medicine) Initialism of acromioclavicular. / Initialism of air conditioned. / (religion) Initialism of antichristian.

Initialism of anno Christi (in the year of Christ). / Initialism of ante Christum, (before Christ).

Initialism of all clear (as in button on electronic calculator). / (medicine) Initialism of ante cibum (before meals). / (law) as charged, as in: guilty as charged, usually a/c.

Aceh, an autonomous province of Indonesia. / (geography) Acre, a state of Brazil. / Initialism of America's Cup (competition yacht sailing match racing regatta).

account; money of account / alicyclic / Abbreviation of acre. / Alternative letter-case form of AC (“air conditioning”) / (electricity) Alternative letter-case form of AC (“alternating current”)

(medicine) ante cibum, before meals

(slang, African-American Vernacular) The Acura Legend automobile.

Initialism of air-conditioning. / (meteorology) Initialism of altocumulus cloud. / Abbreviation of acetate. / Abbreviation of acetyl.

(in place names) oak.