plural of argumentum ad feminam

The informal fallacy of dismissing an argument as untrue or absurd without explaining why.

plural of want ad

(aviation) Initialism of Automatic dependent surveillance – broadcast. (automated broadcast of aircraft location information from satellite navigation systems to air traffic control networks)

present participle of add up

A simple mechanical or electromechanical calculator that could only perform simple calculations such as addition or subtraction

(aviation) Initialism of automatic dependent surveillance - contract. (automated transmission of GPS location information from an aircraft via a contractual agreement with an ACARS provider)

plural of adding machine

plural of banner ad

plural of classified ad