Summer cooler, for short

•Initialism of adenylyl cyclase.

•Initialism of adjuvant chemotherapy.

•The maximum altitude above sea level that an aircraft or missile can maintain horizontal flight under normal conditions.

•Account; money of account

•Alicyclic

•The practice of restricting entrance to a property, a building, or a room to authorized persons.

•In technology, permitting or denying the use of a particular resource.

•A regularly updated record of transactions between two parties showing what is owed or due to each party or a statement summarising the position

•An English unit of land area (symbol: a. or ac.) originally denoting a day's plowing for a yoke of oxen, now standardized as 4,840 square yards or 4,046.86 square meters.

•Any of various similar units of area in other systems.

•A category of music including soft rock, ballads, easy listening, soul, and rhythm and blues.

•The state of temperature and humidity produced by an air conditioner.

•An air conditioner or system of air conditioners.

•A member of the lowest rank in the Royal Air Force or the air forces of various other Commonwealth countries.

•An electric current in which the direction of flow of the electrons reverses periodically, such as sawtooth, sinusoidal or square wave current.

•An electric current in which the direction of flow of the electrons reverses periodically by a sinusoidal law, hence having an average of zero, with positive and negative values (with a frequency of 50 Hz in Europe, 60 Hz in the US, 400 Hz for airport lighting, and some others); especially such a current produced by a rotating generator or alternator.

•A water-soluble salt of ammonia and hydrochloric acid, having the formula NH4Cl.

•A space inside the eye between the cornea and the iris, filled with aqueous humour.

•A prefix appended to a telephone number indicating the geographical area.

•One of the axioms of set theory, equivalent to the statement that an arbitrary direct product of non-empty sets is non-empty; any version of said axiom, for example specifying the cardinality of the number of sets from which choices are made.

•Ante cibum, before meals