(aviation) A facility for controlling aircraft at high altitudes between airport approaches and departures.

plural of important bird area

(ornithology, conservation) A area recognised as requiring conservation and management due to its importance for the survival of bird species that are vulnerable to global extinction.

(UK, obsolete) A thief who steals from kitchens and cellars.

plural of area sneak

The development of areas (as in the brain) that have different function

plural of denied area

(US, espionage) An extremely hostile operational environment with heavy surveillance.

A municipality of Puerto Rico, United States / Ellipsis of Arecibo Observatory.; a radio astronomy astronomical observatory located in Arecibo, Puerto Rico

Alternative form of aread