A deceitful military operation performed to convince the targets of the operation that they have had an encounter with extraterrestrial beings which is actually a staged ploy

plural of abandoned property

(law) Property that is found in such a state as to make it likely that the original owner has intentionally given up all dominion and control over the property, with no intent of returning to or recovering the property.

Alternative spelling of abbr.

plural of abdominal cavity

plural of abdominal wall

The layer of muscles that surrounds the abdominal cavity and contains the abdominal organs.

(anatomy) The hollow portion of the torso within the abdomen, containing the abdominal organs, in mammals below the diaphragm.

(optics) A type of lens aberration which causes blurriness, particularly away from the centre of the lens.

(law) To be accomplice to someone in an illegal act.