(military) Initialism of armor piercing capped.

Of or connected with the apex. / (botany, of a meristem) Situated at the growing tip of the plant or its roots, in comparison with intercalary growth situated between zones of permanent tissue.

(phonetics) A sound produced by obstructing the air passage with the tip of the tongue.

Of or relating to an apocalypse (a revelation), revelatory; prophetic. / Of or relating to an apocalypse (a disaster). / Portending a future apocalypse (disaster, devastation, or doom).

One who predicts apocalypse.

The Apache peoples living primarily in east central Arizona.

The Southern Athabascan language spoken by the Western Apache people.

(US) a set of buildings containing many apartments and ancillary functions

away from, or separate / without, or lacking / (chemistry) derived from, or related to / (biochemistry) the apoprotein form of the protein

(oceanography) That part of the deep body of an ocean or lake that receives insufficient sunlight for photosynthesis to be possible.