Accessories : The tools used by stamp collectors, such as tongs, hinges, etc.

Adhesive : A gummed stamp made to be attached to mail.

Aerogramme : Air letters designed to be letters and envelopes in one. They are specially stamped and ready for folding.

Aerophilately : Stamp collecting that focuses on stamps or postage relating to airmail.

Album : A book designed to hold stamps and covers.

Albino : A fortuitous omission of color from a stamp which results in a colorless impression of the design.

Analine : A fugitive ink or dye which causes suffusion of color.

Approvals : Stamps sent by a dealer to a collector for examination. Approvals must either be bought or returned to the dealer within a specified time.

Auction : A sale at which philatelic material is sold to the highest bidder.